rfc:datetime_and_daylight_saving_time

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rfc:datetime_and_daylight_saving_time [2011/08/25 02:46] – clarify things after discussions with derick danielcrfc:datetime_and_daylight_saving_time [2017/09/22 13:28] (current) – external edit 127.0.0.1
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 ====== Request for Comments: DateTime and Daylight Saving Time Transitions ====== ====== Request for Comments: DateTime and Daylight Saving Time Transitions ======
-  * Version: 0.2 +  * Version: 1.0 
-  * Date: 2011-08-24 +  * Date: 2011-10-18 
-  * Author: Daniel Convissor <danielc@php.net> +  * Author: Daniel Convissor <danielc@php.net> with feedback from Derick Rethans <derick@php.net> 
-  * Status: Draft+  * Status: Accepted ([[rfc:datetime_and_daylight_saving_time:vote|voting results]])
   * First Published at: https://wiki.php.net/rfc/datetime_and_daylight_saving_time   * First Published at: https://wiki.php.net/rfc/datetime_and_daylight_saving_time
  
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 Getting these issues straightened out before 5.4 goes into Release Candidate Getting these issues straightened out before 5.4 goes into Release Candidate
 status seems wise. status seems wise.
 +
 +
 +===== Zone Types =====
 +PHP uses three different time zone data structures internally.
 +
 +Zone Type 3 objects contain the transition data required for proper
 +calculations around the Daylight/Standard time changes.
 +
 +Zone Type 1 and 2 objects just know their offset from UTC, so addition and
 +subtraction on them ignore crossing over Daylight/Standard thresholds.
 +
 +This RFC focuses on the changes needed to make Zone Type 3 work in a
 +comprehensive manner.  Zone Type 1 and 2 behaviors are covered to clarify
 +their expected behavior.
 +
 +==== Examples ====
 +Examples of how to create DateTime objects containing each zone type:
 +
 +=== Zone Type 1: Offset ===
 +<code php>
 +$d = new DateTime('2011-09-13 14:15:16 -0400');
 +</code>
 +
 +=== Zone Type 2: Abbreviation ===
 +<code php>
 +$d = new DateTime('2011-09-13 14:15:16 EDT');
 +</code>
 +
 +=== Zone Type 3: ID ===
 +<code php>
 +$d = new DateTime('2011-09-13 14:15:16');
 +// or
 +$d = new DateTime('2011-09-13 14:15:16', new DateTimeZone('America/New_York'));
 +</code>
 +
  
 ===== Time Zone for Sake of Discussion ===== ===== Time Zone for Sake of Discussion =====
-The ''America/New_York'' time zone will be used as the basis for this +The ''America/New_York'' time zone will be used for demonstration purposes. 
-discussion.  The Standard/Daylight transition in this zone happens at+The Standard/Daylight transition in this zone happens at
 2:00 am.  The forward transition (in spring) jumps to 3:00 am, skipping 2:00 am.  The forward transition (in spring) jumps to 3:00 am, skipping
 over the hour of 2 am.  The backward transition (in fall) jumps back to over the hour of 2 am.  The backward transition (in fall) jumps back to
-1:00 am, repeating the hour of 1am.+1:00 am, repeating the hour of 1 am.
  
-Other zones use different transition quantities and times.+Other time zone changes have different lengths of time and take effect 
 +at different days/times.
  
  
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 (between ''1:00:00 am'' and ''1:59:59 am'' Standard Time). (between ''1:00:00 am'' and ''1:59:59 am'' Standard Time).
  
-This RFC proposes adjusting the time string parser to handle strings ending +This RFC proposes adjusting the time string parser to handle strings containing 
-in ''DST'' and ''ST''.  When ''DST'' or ''ST'' are not present, PHP will use+''DST'' and ''ST''.  When ''DST'' or ''ST'' are not present, PHP will use
 the current behavior, which uses the time zone offset in place at the the current behavior, which uses the time zone offset in place at the
 specified time and uses DST offset during the repeated hour during backward specified time and uses DST offset during the repeated hour during backward
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 </code> </code>
  
-Attempts to create a time that is during Daylight Saving Time but using +The ''ST'' or ''DST'' modifiers can only be used when specifying times 
-''ST'' should roll the time forward to Daylight Saving Time. +during the backward transition period.  Using the modifiers at other times 
-Attempts to create a time that is during Standard Time but using +will throw an exception in object-oriented style code while procedural 
-''DST'' should roll the time back to Standard Time.+style code will return false without triggering errors.
  
  
 ===== Math ===== ===== Math =====
 +The date format used in this section is for display purposes only, does
 +not correspond to a PHP format, nor is intended to be parsed by PHP.
 +
 +Reminder: the time zone in the examples is ''America/New_York''.
 +So "(ST)" represents Eastern Standard Time/EST/-0500 and "(DT)"
 +represents Eastern Daylight Time/EDT/-0400.
 +
 +The behaviors indicated here are covered by unit tests in ''ext/date/tests'':
 +  * rfc-datetime_and_daylight_saving_time-type1.phpt
 +  * rfc-datetime_and_daylight_saving_time-type2.phpt
 +  * rfc-datetime_and_daylight_saving_time-type3.phpt
 +
 +Each output line in the test files is prefixed with an identifier
 +that corresponds to the ''phpt'' columns in the tables below.
 +
 +Actual results for Zone Types 1 and 2 are shown as ''N/A'' for the moment.
 +All Zone Type 1 tests pass.  Zone Type 2 results are tainted by
 +[[https://bugs.php.net/bug.php?id=55253|Bug 55253]].
 +
 ==== Forward Transitions ==== ==== Forward Transitions ====
-=== diff() === +=== Zone Type 3 === 
-^ End ^ Start ^ Expected Result ^ Currently Works ^ +== diff() == 
-| ''2010-03-14 03:00:00 EDT'' | ''2010-03-14 01:59:59 EST'' | PT0H0M1S | N | +^ End ^ Start ^ Expected ^ phpt ^ Actual (if wrong) ^ 
-| ''2010-03-14 04:30:00 EDT'' | ''2010-03-13 04:30:00 EST'' | P1DT0H | Y | +| ''2010-03-14T03:00:00''//(DT)// | ''2010-03-14T01:59:59''//(ST)// | PT0H0M1S | fd1 | PT1H0M1S | 
-| ''2010-03-14 03:30:00 EDT'' | ''2010-03-13 04:30:00 EST'' | P0DT22H | N | +| ''2010-03-14T04:30:00''//(DT)// | ''2010-03-13T04:30:00''//(ST)// | P1DT0H   | fd2 | | 
-| ''2010-03-14 01:30:00 EST'' | ''2010-03-13 04:30:00 EST'' | P0DT21H | Y | +| ''2010-03-14T03:30:00''//(DT)// | ''2010-03-13T04:30:00''//(ST)// | P0DT22H  | fd3 | P0DT23H | 
-| ''2010-03-14 01:30:00 EST'' | ''2010-03-13 01:30:00 EST'' | P1DT0H | Y |+| ''2010-03-14T01:30:00''//(ST)// | ''2010-03-13T04:30:00''//(ST)// | P0DT21H  | fd4 | | 
 +| ''2010-03-14T01:30:00''//(ST)// | ''2010-03-13T01:30:00''//(ST)// | P1DT0H   | fd5 | | 
 +| ''2010-03-14T03:30:00''//(DT)// | ''2010-03-13T03:30:00''//(ST)// | P1DT0H   | fd6 | | 
 +| ''2010-03-14T03:30:00''//(DT)// | ''2010-03-13T02:30:00''//(ST)// | P1DT1H   | fd7 | |
  
-=== add() === +== add() == 
-^ Start ^ Interval ^ Expected Result ^ Currently Works ^ +^ Start ^ Interval ^ Expected ^ phpt ^ Actual (if wrong) ^ 
-| ''2010-03-14 01:59:59 EST'' | PT1S | ''2010-03-14 03:00:00 EDT'' | Y | +| ''2010-03-14T01:59:59''//(ST)// | PT1S  | ''2010-03-14T03:00:00''//(DT)// | fa1 | | 
-| ''2010-03-13 04:30:00 EST'' | P1D | ''2010-03-14 04:30:00 EDT'' | Y | +| ''2010-03-13T04:30:00''//(ST)// | P1D   | ''2010-03-14T04:30:00''//(DT)// | fa2 | | 
-| ''2010-03-13 04:30:00 EST'' | PT22H | ''2010-03-14 03:30:00 EDT'' | Y | +| ''2010-03-13T04:30:00''//(ST)// | PT22H | ''2010-03-14T03:30:00''//(DT)// | fa3 | | 
-| ''2010-03-13 04:30:00 EST'' | PT21H | ''2010-03-14 01:30:00 EST'' | Y | +| ''2010-03-13T04:30:00''//(ST)// | PT21H | ''2010-03-14T01:30:00''//(ST)// | fa4 | | 
-| ''2010-03-13 01:30:00 EST'' | P1D | ''2010-03-14 01:30:00 EST'' | Y | +| ''2010-03-13T01:30:00''//(ST)// | P1D   | ''2010-03-14T01:30:00''//(ST)// | fa5 | | 
-| ''2010-03-13 02:30:00 EST'' | P1D | ''2010-03-14 02:30:00 EDT'' | Y |+| ''2010-03-13T02:30:00''//(ST)// | P1D   | ''2010-03-14T02:30:00''//(DT)// | fa6 | |
  
-=== sub() === +== sub() == 
-^ End ^ Interval ^ Expected Result ^ Currently Works ^ +^ End ^ Interval ^ Expected ^ phpt ^ Actual (if wrong) ^ 
-| ''2010-03-14 03:00:00 EDT'' | PT1S | ''2010-03-14 01:59:59 EST'' | N | +| ''2010-03-14T03:00:00''//(DT)// | PT1S  | ''2010-03-14T01:59:59''//(ST)// | fs1 | ''2010-03-14T03:59:59''//(DT)// | 
-| ''2010-03-14 04:30:00 EDT'' | P1D | ''2010-03-13 04:30:00 EST'' | Y | +| ''2010-03-14T04:30:00''//(DT)// | P1D   | ''2010-03-13T04:30:00''//(ST)// | fs2 | | 
-| ''2010-03-14 03:30:00 EDT'' | PT22H | ''2010-03-13 04:30:00 EST'' | N | +| ''2010-03-14T03:30:00''//(DT)// | PT22H | ''2010-03-13T04:30:00''//(ST)// | fs3 | ''2010-03-13T05:30:00''//(ST)// | 
-| ''2010-03-14 01:30:00 EST'' | PT21H | ''2010-03-13 04:30:00 EST'' | Y | +| ''2010-03-14T01:30:00''//(ST)// | PT21H | ''2010-03-13T04:30:00''//(ST)// | fs4 | | 
-| ''2010-03-14 01:30:00 EST'' | P1D | ''2010-03-13 01:30:00 EST'' | Y |+| ''2010-03-14T01:30:00''//(ST)// | P1D   | ''2010-03-13T01:30:00''//(ST)// | fs5 | | 
 +| ''2010-03-15T03:30:00''//(DT)// | P1D   | ''2010-03-14T03:30:00''//(DT)// | fs6 | | 
 +| ''2010-03-15T02:30:00''//(DT)// | P1D   | ''2010-03-14T03:30:00''//(DT)// | fs7 | | 
 + 
 +=== Zone Types 1 & 2 === 
 +== diff() == 
 +^ End ^ Start ^ Expected ^ phpt ^ Actual (if wrong) ^ 
 +| ''2010-03-14T03:00:00''//(DT)// | ''2010-03-14T01:59:59''//(ST)// | PT0H0M1S | fd1 | | 
 +| ''2010-03-14T04:30:00''//(DT)// | ''2010-03-13T04:30:00''//(ST)// | P0DT23H  | fd2 | | 
 +| ''2010-03-14T03:30:00''//(DT)// | ''2010-03-13T04:30:00''//(ST)// | P0DT22H  | fd3 | | 
 +| ''2010-03-14T01:30:00''//(ST)// | ''2010-03-13T04:30:00''//(ST)// | P0DT21H  | fd4 | | 
 +| ''2010-03-14T01:30:00''//(ST)// | ''2010-03-13T01:30:00''//(ST)// | P1DT0H   | fd5 | | 
 +| ''2010-03-14T03:30:00''//(DT)// | ''2010-03-13T03:30:00''//(ST)// | P0DT23H  | fd6 | | 
 +| ''2010-03-14T03:30:00''//(DT)// | ''2010-03-13T02:30:00''//(ST)// | P1DT0H   | fd7 | | 
 + 
 +== add() == 
 +^ Start ^ Interval ^ Expected ^ phpt ^ Actual (if wrong) ^ 
 +| ''2010-03-14T01:59:59''//(ST)// | PT1S  | ''2010-03-14T02:00:00''//(ST)// | fa1 | N/A | 
 +| ''2010-03-13T04:30:00''//(ST)// | P1D   | ''2010-03-14T04:30:00''//(ST)// | fa2 | N/A | 
 +| ''2010-03-13T04:30:00''//(ST)// | PT22H | ''2010-03-14T02:30:00''//(ST)// | fa3 | N/A | 
 +| ''2010-03-13T04:30:00''//(ST)// | PT21H | ''2010-03-14T01:30:00''//(ST)// | fa4 | N/A | 
 +| ''2010-03-13T01:30:00''//(ST)// | P1D   | ''2010-03-14T01:30:00''//(ST)// | fa5 | N/A | 
 +| ''2010-03-13T02:30:00''//(ST)// | P1D   | ''2010-03-14T02:30:00''//(ST)// | fa6 | N/A | 
 + 
 +== sub() == 
 +^ End ^ Interval ^ Expected ^ phpt ^ Actual (if wrong) ^ 
 +| ''2010-03-14T03:00:00''//(DT)// | PT1S  | ''2010-03-14T02:59:59''//(DT)// | fs1 | N/A | 
 +| ''2010-03-14T04:30:00''//(DT)// | P1D   | ''2010-03-13T04:30:00''//(DT)// | fs2 | N/A | 
 +| ''2010-03-14T03:30:00''//(DT)// | PT22H | ''2010-03-13T05:30:00''//(DT)// | fs3 | N/A | 
 +| ''2010-03-14T01:30:00''//(ST)// | PT21H | ''2010-03-13T04:30:00''//(ST)// | fs4 | N/A | 
 +| ''2010-03-14T01:30:00''//(ST)// | P1D   | ''2010-03-13T01:30:00''//(ST)// | fs5 | N/A | 
 +| ''2010-03-15T03:30:00''//(DT)// | P1D   | ''2010-03-14T03:30:00''//(DT)// | fs6 | N/A | 
 +| ''2010-03-15T02:30:00''//(DT)// | P1D   | ''2010-03-14T02:30:00''//(DT)// | fs7 | N/A |
  
 ==== Backward Transitions ==== ==== Backward Transitions ====
-=== diff() === +=== Zone Type 3 === 
-^ End ^ Start ^ Expected Result ^ Currently Works ^ +== diff() == 
-| ''2010-11-07 01:00:00 EST'' | ''2010-11-07 01:59:59 EDT'' | PT0H0M1S | N | +^ End ^ Start ^ Expected ^ phpt ^ Actual (if wrong) ^ 
-| ''2010-11-07 04:30:00 EST'' | ''2010-11-06 04:30:00 EDT'' | P1DT0H | Y | +| ''2010-11-07T01:00:00''//(ST)// | ''2010-11-07T01:59:59''//(DT)// | PT0H0M1S | bd1 | PT0H59M59S | 
-| ''2010-11-07 03:30:00 EST'' | ''2010-11-06 04:30:00 EDT'' | P0DT24H | N | +| ''2010-11-07T04:30:00''//(ST)// | ''2010-11-06T04:30:00''//(DT)// | P1DT0H   | bd2 | | 
-| ''2010-11-07 02:30:00 EST'' | ''2010-11-06 04:30:00 EDT'' | P0DT23H | N | +| ''2010-11-07T03:30:00''//(ST)// | ''2010-11-06T04:30:00''//(DT)// | P0DT24H  | bd3 | P0DT23H | 
-| ''2010-11-07 01:30:00 EST'' | ''2010-11-06 04:30:00 EDT'' | P0DT22H | N | +| ''2010-11-07T02:30:00''//(ST)// | ''2010-11-06T04:30:00''//(DT)// | P0DT23H  | bd4 | P0DT22H | 
-| ''2010-11-07 01:30:00 EDT'' | ''2010-11-06 04:30:00 EDT'' | P0DT21H | Y | +| ''2010-11-07T01:30:00''//(ST)// | ''2010-11-06T04:30:00''//(DT)// | P0DT22H  | bd5 | P0DT21H | 
-| ''2010-11-07 01:30:00 EDT'' | ''2010-11-06 01:30:00 EDT'' | P1DT0H | Y | +| ''2010-11-07T01:30:00''//(DT)// | ''2010-11-06T04:30:00''//(DT)// | P0DT21H  | bd6 | | 
-| ''2010-11-07 01:30:00 EST'' | ''2010-11-06 01:30:00 EDT'' | P1DT1H | N |+| ''2010-11-07T01:30:00''//(DT)// | ''2010-11-06T01:30:00''//(DT)// | P1DT0H   | bd7 | | 
 +| ''2010-11-07T01:30:00''//(ST)// | ''2010-11-06T01:30:00''//(DT)// | P1DT1H   | bd8 | P1DT1H | 
 + 
 +== add() == 
 +^ Start ^ Interval ^ Expected ^ phpt ^ Actual (if wrong) ^ 
 +| ''2010-11-07T01:59:59''//(DT)// | PT1S   | ''2010-11-07T01:00:00''//(ST)// | ba1 | ''2010-11-07T01:00:00''//(ST)// | 
 +| ''2010-11-06T04:30:00''//(DT)// | P1D    | ''2010-11-07T04:30:00''//(ST)// | ba2 | | 
 +| ''2010-11-06T04:30:00''//(DT)// | PT24H  | ''2010-11-07T03:30:00''//(ST)// | ba3 | ''2010-11-07T04:30:00''//(ST)// | 
 +| ''2010-11-06T04:30:00''//(DT)// | PT23H  | ''2010-11-07T02:30:00''//(ST)// | ba4 | ''2010-11-07T03:30:00''//(ST)// | 
 +| ''2010-11-06T04:30:00''//(DT)// | PT22H  | ''2010-11-07T01:30:00''//(ST)// | ba5 | ''2010-11-07T02:30:00''//(ST)// | 
 +| ''2010-11-06T04:30:00''//(DT)// | PT21H  | ''2010-11-07T01:30:00''//(DT)// | ba6 | | 
 +| ''2010-11-06T01:30:00''//(DT)// | P1D    | ''2010-11-07T01:30:00''//(DT)// | ba7 | | 
 +| ''2010-11-06T01:30:00''//(DT)// | P1DT1H | ''2010-11-07T01:30:00''//(ST)// | ba8 | ''2010-11-07T02:30:00''//(ST)// | 
 +| ''2010-11-06T04:30:00''//(DT)// | PT25H  | ''2010-11-07T04:30:00''//(ST)// | ba9 | ''2010-11-07T05:30:00''//(ST)// | 
 +| ''2010-11-06T03:30:00''//(DT)// | P1D    | ''2010-11-07T03:30:00''//(ST)// | ba10| | 
 +| ''2010-11-06T02:30:00''//(DT)// | P1D    | ''2010-11-07T02:30:00''//(ST)// | ba11| | 
 + 
 +== sub() == 
 +^ End ^ Interval ^ Expected ^ phpt ^ Actual (if wrong) ^ 
 +| ''2010-11-07T01:00:00''//(ST)// | PT1S   | ''2010-11-07T01:59:59''//(DT)// | bs1 | ''2010-11-07T00:59:59''//(DT)// | 
 +| ''2010-11-07T04:30:00''//(ST)// | P1D    | ''2010-11-06T04:30:00''//(DT)// | bs2 | | 
 +| ''2010-11-07T03:30:00''//(ST)// | PT24H  | ''2010-11-06T04:30:00''//(DT)// | bs3 | ''2010-11-06T03:30:00''//(DT)// | 
 +| ''2010-11-07T02:30:00''//(ST)// | PT23H  | ''2010-11-06T04:30:00''//(DT)// | bs4 | ''2010-11-06T03:30:00''//(DT)// | 
 +| ''2010-11-07T01:30:00''//(ST)// | PT22H  | ''2010-11-06T04:30:00''//(DT)// | bs5 | ''2010-11-06T03:30:00''//(DT)// | 
 +| ''2010-11-07T01:30:00''//(DT)// | PT21H  | ''2010-11-06T04:30:00''//(DT)// | bs6 | | 
 +| ''2010-11-07T01:30:00''//(DT)// | P1D    | ''2010-11-06T01:30:00''//(DT)// | bs7 | | 
 +| ''2010-11-07T01:30:00''//(ST)// | P1DT1H | ''2010-11-06T00:30:00''//(DT)// | bs8 | | 
 +| ''2010-11-07T03:30:00''//(ST)// | P1D    | ''2010-11-06T03:30:00''//(DT)// | bs9 | | 
 +| ''2010-11-07T02:30:00''//(ST)// | P1D    | ''2010-11-06T02:30:00''//(DT)// | bs10 | | 
 + 
 +=== Zone Types 1 & 2 === 
 +== diff() == 
 +^ End ^ Start ^ Expected ^ phpt ^ Actual (if wrong) ^ 
 +| ''2010-11-07T01:00:00''//(ST)// | ''2010-11-07T01:59:59''//(DT)// | PT0H0M1S | bd1 | | 
 +| ''2010-11-07T04:30:00''//(ST)// | ''2010-11-06T04:30:00''//(DT)// | P1DT1H   | bd2 | | 
 +| ''2010-11-07T03:30:00''//(ST)// | ''2010-11-06T04:30:00''//(DT)// | P1DT0H   | bd3 | | 
 +| ''2010-11-07T02:30:00''//(ST)// | ''2010-11-06T04:30:00''//(DT)// | P0DT23H  | bd4 | | 
 +| ''2010-11-07T01:30:00''//(ST)// | ''2010-11-06T04:30:00''//(DT)// | P0DT22H  | bd5 | | 
 +| ''2010-11-07T01:30:00''//(DT)// | ''2010-11-06T04:30:00''//(DT)// | P0DT21H  | bd6 | | 
 +| ''2010-11-07T01:30:00''//(DT)// | ''2010-11-06T01:30:00''//(DT)// | P1DT0H   | bd7 | | 
 +| ''2010-11-07T01:30:00''//(ST)// | ''2010-11-06T01:30:00''//(DT)// | P1DT1H   | bd8 | |
  
-=== add() === +== add() == 
-^ Start ^ Interval ^ Expected Result ^ Currently Works ^ +^ Start ^ Interval ^ Expected ^ phpt ^ Actual (if wrong) ^ 
-| ''2010-11-07 01:59:59 EDT'' | PT1S | ''2010-11-07 01:00:00 EST'' | N | +| ''2010-11-07T01:59:59''//(DT)// | PT1S   | ''2010-11-07T02:00:00''//(DT)// | ba1 | N/A | 
-| ''2010-11-06 04:30:00 EDT'' | P1D | ''2010-11-07 04:30:00 EST'' | Y | +| ''2010-11-06T04:30:00''//(DT)// | P1D    | ''2010-11-07T04:30:00''//(DT)// | ba2 | N/A | 
-| ''2010-11-06 04:30:00 EDT'' | PT24H | ''2010-11-07 03:30:00 EST'' | N | +| ''2010-11-06T04:30:00''//(DT)// | PT24H  | ''2010-11-07T04:30:00''//(DT)// | ba3 | N/A | 
-| ''2010-11-06 04:30:00 EDT'' | PT23H | ''2010-11-07 02:30:00 EST'' | N | +| ''2010-11-06T04:30:00''//(DT)// | PT23H  | ''2010-11-07T03:30:00''//(DT)// | ba4 | N/A | 
-| ''2010-11-06 04:30:00 EDT'' | PT22H | ''2010-11-07 01:30:00 EST'' | N | +| ''2010-11-06T04:30:00''//(DT)// | PT22H  | ''2010-11-07T02:30:00''//(DT)// | ba5 | N/A | 
-| ''2010-11-06 04:30:00 EDT'' | PT21H | ''2010-11-07 01:30:00 EDT'' | Y | +| ''2010-11-06T04:30:00''//(DT)// | PT21H  | ''2010-11-07T01:30:00''//(DT)// | ba6 | N/A | 
-| ''2010-11-06 01:30:00 EDT'' | P1D | ''2010-11-07 01:30:00 EDT'' | Y | +| ''2010-11-06T01:30:00''//(DT)// | P1D    | ''2010-11-07T01:30:00''//(DT)// | ba7 | N/A | 
-| ''2010-11-06 01:30:00 EDT'' | P1DT1H | ''2010-11-07 01:30:00 EST'' | N |+| ''2010-11-06T01:30:00''//(DT)// | P1DT1H | ''2010-11-07T02:30:00''//(DT)// | ba8 | N/A | 
 +| ''2010-11-06T04:30:00''//(DT)// | PT25H  | ''2010-11-07T05:30:00''//(DT)// | ba9 | N/A | 
 +| ''2010-11-06T03:30:00''//(DT)// | P1D    | ''2010-11-07T03:30:00''//(DT)// | ba10| N/A | 
 +| ''2010-11-06T02:30:00''//(DT)// | P1D    | ''2010-11-07T02:30:00''//(DT)// | ba11| N/A |
  
-=== sub() === +== sub() == 
-^ End ^ Interval ^ Expected Result ^ Currently Works ^ +^ End ^ Interval ^ Expected ^ phpt ^ Actual (if wrong) ^ 
-| ''2010-11-07 01:00:00 EST'' | PT1S | ''2010-11-07 01:59:59 EDT'' | N | +| ''2010-11-07T01:00:00''//(ST)// | PT1S   | ''2010-11-07T00:59:59''//(ST)// | bs1 | N/A | 
-| ''2010-11-07 04:30:00 EST'' | P1D | ''2010-11-06 04:30:00 EDT'' | Y | +| ''2010-11-07T04:30:00''//(ST)// | P1D    | ''2010-11-06T04:30:00''//(ST)// | bs2 | N/A | 
-| ''2010-11-07 03:30:00 EST'' | PT24H | ''2010-11-06 04:30:00 EDT'' | N | +| ''2010-11-07T03:30:00''//(ST)// | PT24H  | ''2010-11-06T03:30:00''//(ST)// | bs3 | N/A | 
-| ''2010-11-07 02:30:00 EST'' | PT23H | ''2010-11-06 04:30:00 EDT'' | N | +| ''2010-11-07T02:30:00''//(ST)// | PT23H  | ''2010-11-06T03:30:00''//(ST)// | bs4 | N/A | 
-| ''2010-11-07 01:30:00 EST'' | PT22H | ''2010-11-06 04:30:00 EDT'' | N | +| ''2010-11-07T01:30:00''//(ST)// | PT22H  | ''2010-11-06T03:30:00''//(ST)// | bs5 | N/A | 
-| ''2010-11-07 01:30:00 EDT'' | PT21H | ''2010-11-06 04:30:00 EDT'' | Y | +| ''2010-11-07T01:30:00''//(DT)// | PT21H  | ''2010-11-06T04:30:00''//(DT)// | bs6 | N/A | 
-| ''2010-11-07 01:30:00 EDT'' | P1D | ''2010-11-06 01:30:00 EDT'' | Y | +| ''2010-11-07T01:30:00''//(DT)// | P1D    | ''2010-11-06T01:30:00''//(DT)// | bs7 | N/A | 
-| ''2010-11-07 01:30:00 EST'' | P1DT1H | ''2010-11-06 01:30:00 EDT'' | N |+| ''2010-11-07T01:30:00''//(ST)// | P1DT1H | ''2010-11-06T00:30:00''//(ST)// | bs8 | N/A | 
 +| ''2010-11-07T03:30:00''//(ST)// | P1D    | ''2010-11-06T03:30:00''//(ST)// | bs9 | N/A | 
 +| ''2010-11-07T02:30:00''//(ST)// | P1D    | ''2010-11-06T02:30:00''//(ST)// | bs10 | N/A |
  
  
 ===== Other Issues? ===== ===== Other Issues? =====
-If you know of other problems, please add them here or bring them to the +If you know of other problems, please bring them to the attention of the authors.
-attention of the authors.+
  
  
 ===== Changelog ===== ===== Changelog =====
rfc/datetime_and_daylight_saving_time.1314240409.txt.gz · Last modified: 2017/09/22 13:28 (external edit)

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