Supported Date and Time Formats

目录

This section describes all the different formats that the strtotime, DateTime and date_create parser understands. The formats are grouped by section. In most cases formats from different sections, separated by whitespace, comma or dot, can be used in the same date/time string. For each of the supported formats, one or more examples are given, as well as a description for the format. Characters in single quotes in the formats are case-insensitive ('t' could be t or T), characters in double quotes are case-sensitive ("T" is only T).

Time Formats

This page describes the different time formats that the strtotime, DateTime and date_create parser understands.

DescriptionFormatsExamples
frac. [0-9]+".21342", ".85"
hh"0"?[1-9] | "1"[0-2]"04", "7", "12"
HH[01][0-9] | "2"[0-4]"04", "07", "19"
meridian[AaPp] .? [Mm] .? [\0\t ]"A.m.", "pM", "am."
MM[0-5][0-9]"00", "12", "59"
II[0-5][0-9]"00", "12", "59"
space[ \t] 
tz"("? [A-Za-z]{1,6} ")"? | [A-Z][a-z]+([_/][A-Z][a-z]+)+"CEST", "Europe/Amsterdam", "America/Indiana/Knox"
tzcorrection"GMT"? [+-] hh ":"? MM?"+0400", "GMT-07:00", "-07:00"
DescriptionFormatExamples
Hour only, with meridianhh space? meridian"4 am", "5PM"
Hour and minutes, with meridianhh [.:] MM space? meridian"4:08 am", "7:19P.M."
Hour, minutes and seconds, with meridianhh [.:] MM [.:] II space? meridian"4:08:37 am", "7:19:19P.M."
MS SQL (Hour, minutes, seconds and fraction with meridian), PHP 5.3 and later onlyhh ":" MM ":" II [.:] [0-9]+ meridian"4:08:39:12313am"
DescriptionFormatExamples
Hour and minutes't'? HH [.:] MM"04:08", "19.19", "T23:43"
Hour and minutes, no colon't'? HH MM"0408", "t1919", "T2343"
Hour, minutes and seconds't'? HH [.:] MM [.:] II"04.08.37", "t19:19:19"
Hour, minutes and seconds, no colon't'? HH MM II"040837", "T191919"
Hour, minutes, seconds and timezone't'? HH [.:] MM [.:] II space? ( tzcorrection | tz )"040837CEST", "T191919-0700"
Hour, minutes, seconds and fraction't'? HH [.:] MM [.:] II frac"04.08.37.81412", "19:19:19.532453"
Time zone informationtz | tzcorrection"CEST", "Europe/Amsterdam", "+0430", "GMT-06:00"

Date Formats

This page describes the different date formats that the strtotime, DateTime and date_create parser understands.

DescriptionFormatExamples
daysuf"st" | "nd" | "rd" | "th" 
dd([0-2]?[0-9] | "3"[01]) daysuf?"7th", "22nd", "31"
DD"0" [0-9] | [1-2][0-9] | "3" [01]"07", "31"
m'january' | 'february' | 'march' | 'april' | 'may' | 'june' | 'july' | 'august' | 'september' | 'october' | 'november' | 'december' | 'jan' | 'feb' | 'mar' | 'apr' | 'may' | 'jun' | 'jul' | 'aug' | 'sep' | 'sept' | 'oct' | 'nov' | 'dec' | "I" | "II" | "III" | "IV" | "V" | "VI" | "VII" | "VIII" | "IX" | "X" | "XI" | "XII" 
M'jan' | 'feb' | 'mar' | 'apr' | 'may' | 'jun' | 'jul' | 'aug' | 'sep' | 'sept' | 'oct' | 'nov' | 'dec' 
mm"0"? [0-9] | "1"[0-2]"0", "04", "7", "12"
MM"0" [0-9] | "1"[0-2]"00", "04", "07", "12"
y[0-9]{1,4}"00", "78", "08", "8", "2008"
yy[0-9]{2}"00", "08", "78"
YY[0-9]{4}"2000", "2008", "1978"
DescriptionFormatExamples
American month and daymm "/" dd"5/12", "10/27"
American month, day and yearmm "/" dd "/" y"12/22/78", "1/17/2006", "1/17/6"
Four digit year, month and day with slashesYY "/" mm "/" dd"2008/6/30", "1978/12/22"
Four digit year and month (GNU)YY "-" mm"2008-6", "2008-06", "1978-12"
Year, month and day with dashesy "-" mm "-" dd"2008-6-30", "78-12-22", "8-6-21"
Day, month and four digit year, with dots, tabs or dashesdd [.\t-] mm [.-] YY"30-6-2008", "22.12.1978"
Day, month and two digit year, with dots or tabsdd [.\t] mm "." yy"30.6.08", "22\t12.78"
Day, textual month and yeardd ([ \t.-])* m ([ \t.-])* y"30-June 2008", "22DEC78", "14 III 1879"
Textual month and four digit year (Day reset to 1)m ([ \t.-])* YY"June 2008", "DEC1978", "March 1879"
Four digit year and textual month (Day reset to 1)YY ([ \t.-])* m"2008 June", "1978-XII", "1879.MArCH"
Textual month, day and yearm ([ .\t-])* dd [,.stndrh\t ]+ y"July 1st, 2008", "April 17, 1790", "May.9,78"
Textual month and daym ([ .\t-])* dd [,.stndrh\t ]*"July 1st,", "Apr 17", "May.9"
Day and textual monthd ([ .\t-])* m"1 July", "17 Apr", "9.May"
Month abbreviation, day and yearM "-" DD "-" y"May-09-78", "Apr-17-1790"
Year, month abbreviation and dayy "-" M "-" DD"78-Dec-22", "1814-MAY-17"
Year (and just the year)YY"1978", "2008"
Textual month (and just the month)m"March", "jun", "DEC"
DescriptionFormatExamples
Eight digit year, month and dayYY MM DD"15810726", "19780417", "18140517"
Four digit year, month and day with slashesYY "/" MM "/" DD"2008/06/30", "1978/12/22"
Two digit year, month and day with dashesyy "-" MM "-" DD"08-06-30", "78-12-22"
Four digit year with optional sign, month and day[+-]? YY "-" MM "-" DD"-0002-07-26", "+1978-04-17", "1814-05-17"

Note:

For the y and yy formats, years below 100 are handled in a special way when the y or yy symbol is used. If the year falls in the range 0 (inclusive) to 69 (inclusive), 2000 is added. If the year falls in the range 70 (inclusive) to 99 (inclusive) then 1900 is added. This means that "00-01-01" is interpreted as "2000-01-01".

Note:

The "Day, month and two digit year, with dots or tabs" format (dd [.\t] mm "." yy) only works for the year values 61 (inclusive) to 99 (inclusive) - outside those years the time format "HH [.:] MM [.:] SS" has precedence.

Note:

The "Year (and just the year)" format only works if a time string has already been found -- otherwise this format is recognised as HH MM.

Note:

It is possible to over- and underflow the dd and DD format. Day 0 means the last day of previous month, whereas overflows count into the next month. This makes "2008-08-00" equivalent to "2008-07-31" and "2008-06-31" equivalent to "2008-07-01" (June only has 30 days).

Note that as of PHP 5.1.0 the day range is restricted to 0-31 as indicated by the regular expression above. Thus "2008-06-32" is not a valid date string, for instance.

It is also possible to underflow the mm and MM formats with the value 0. A month value of 0 means December of the previous year. As example "2008-00-22" is equivalent to "2007-12-22".

If you combine the previous two facts and underflow both the day and the month, the following happens: "2008-00-00" first gets converted to "2007-12-00" which then gets converted to "2007-11-30". This also happens with the string "0000-00-00", which gets transformed into "-0001-11-30" (the year -1 in the ISO 8601 calendar, which is 2 BC in the proleptic Gregorian calendar).

Compound Formats

This page describes the different compound date/time formats that the strtotime, DateTime and date_create parser understands.

DescriptionFormatsExamples
DD"0" [0-9] | [1-2][0-9] | "3" [01]"02", "12", "31"
doy"00"[1-9] | "0"[1-9][0-9] | [1-2][0-9][0-9] | "3"[0-5][0-9] | "36"[0-6]"001", "012", "180", "350", "366"
frac. [0-9]+".21342", ".85"
hh"0"?[1-9] | "1"[0-2]"04", "7", "12"
HH[01][0-9] | "2"[0-4]"04", "07", "19"
meridian[AaPp] .? [Mm] .? [\0\t ]"A.m.", "pM", "am."
ii[0-5][0-9]"04", "8", "59"
II[0-5][0-9]"04", "08", "59"
M'jan' | 'feb' | 'mar' | 'apr' | 'may' | 'jun' | 'jul' | 'aug' | 'sep' | 'sept' | 'oct' | 'nov' | 'dec' 
MM[0-1][0-9]"00", "12"
space[ \t] 
ss[0-5][0-9]"04", "8", "59"
SS[0-5][0-9]"04", "08", "59"
W"0"[1-9] | [1-4][0-9] | "5"[0-3]"05", "17", "53"
tzcorrection"GMT"? [+-] hh ":"? II?"+0400", "GMT-07:00", "-07:00"
YY[0-9]{4}"2000", "2008", "1978"
DescriptionFormatExamples
Common Log Formatdd "/" M "/" YY : HH ":" II ":" SS space tzcorrection"10/Oct/2000:13:55:36 -0700"
EXIFYY ":" MM ":" DD " " HH ":" II ":" SS"2008:08:07 18:11:31"
ISO year with ISO weekYY "-"? "W" W"2008W27", "2008-W28"
ISO year with ISO week and dayYY "-"? "W" W "-"? [0-7]"2008W273", "2008-W28-3"
MySQLYY "-" MM "-" DD " " HH ":" II ":" SS"2008-08-07 18:11:31"
PostgreSQL: Year with day-of-yearYY "."? doy"2008.197", "2008197"
SOAPYY "-" MM "-" DD "T" HH ":" II ":" SS frac tzcorrection?"2008-07-01T22:35:17.02", "2008-07-01T22:35:17.03+08:00"
Unix Timestamp"@" "-"? [0-9]+"@1215282385"
XMLRPCYY MM DD "T" hh ":" II ":" SS"20080701T22:38:07", "20080701T9:38:07"
XMLRPC (Compact)YY MM DD 't' hh II SS"20080701t223807", "20080701T093807"
WDDXYY "-" mm "-" dd "T" hh ":" ii ":" ss"2008-7-1T9:3:37"

Note:

The "W" in the "ISO year with ISO week" and "ISO year with ISO week and day" formats is case-sensitive, you can only use the upper case "W".

The "T" in the SOAP, XMRPC and WDDX formats is case-sensitive, you can only use the upper case "T".

The "Unix Timestamp" format sets the timezone to UTC.

Relative Formats

This page describes the different relative date/time formats that the strtotime, DateTime and date_create parser understands.

DescriptionFormat
dayname'sunday' | 'monday' | 'tuesday' | 'wednesday' | 'thursday' | 'friday' | 'saturday' | 'sun' | 'mon' | 'tue' | 'wed' | 'thu' | 'fri' | 'sat'
daytext'weekday' | 'weekdays'
number[+-]?[0-9]+
ordinal'first' | 'second' | 'third' | 'fourth' | 'fifth' | 'sixth' | 'seventh' | 'eighth' | 'ninth' | 'tenth' | 'eleventh' | 'twelfth' | 'next' | 'last' | 'previous' | 'this'
reltext'next' | 'last' | 'previous' | 'this'
space[ \t]+
unit(('sec' | 'second' | 'min' | 'minute' | 'hour' | 'day' | 'fortnight' | 'forthnight' | 'month' | 'year') 's'?) | 'weeks' | daytext
FormatDescriptionExamples
'yesterday'Midnight of yesterday"yesterday 14:00"
'midnight'The time is set to 00:00:00 
'today'The time is set to 00:00:00 
'now'Now - this is simply ignored 
'noon'The time is set to 12:00:00"yesterday noon"
'tomorrow'Midnight of tomorrow 
'back of' hour15 minutes past the specified hour"back of 7pm", "back of 15"
'front of' hour15 minutes before the specified hour"front of 5am", "front of 23"
'first day of'Sets the day of the first of the current month. This phrase is best used together with a month name following it."first day of January 2008"
'last day of'Sets the day to the last day of the current month. This phrase is best used together with a month name following it."last day of next month"
ordinal space dayname space 'of'Calculates the x-th week day of the current month."first sat of July 2008"
'last' space dayname space 'of'Calculates the last week day of the current month."last sat of July 2008"
number space? (unit | 'week')Handles relative time items where the value is a number."+5 weeks", "12 day", "-7 weekdays"
ordinal space unitHandles relative time items where the value is text."fifth day", "second month"
'ago'Negates all the values of previously found relative time items."2 days ago", "8 days ago 14:00", "2 months 5 days ago", "2 months ago 5 days", "2 days ago"
daynameMoves to the next day of this name."Monday"
reltext space 'week'Handles the special format "weekday + last/this/next week"."Monday next week"

Note:

Relative statements are always processed after non-relative statements. This makes "+1 week july 2008" and "july 2008 +1 week" equivalent.

Exceptions to this rule are: "yesterday", "midnight", "today", "noon" and "tomorrow". Note that "tomorrow 11:00" and "11:00 tomorrow" are different. Considering today's date of "July 23rd, 2008" the first one produces "2008-07-24 11:00" where as the second one produces "2008-07-24 00:00". The reason for this is that those five statements directly influence the current time.

Note:

Observe the following remarks when the current day-of-week is the same as the day-of-week used in the date/time string. The current day-of-week could have been (re-)calculated by non-relative parts of the date/time string however.

  1. "dayname" does not advance to another day. (Example: "Wed July 23rd, 2008" means "2008-07-23").
  2. "number dayname" does not advance to another day. (Example: "1 wednesday july 23rd, 2008" means "2008-07-23").
  3. "number week dayname" will first add the number of weeks, but does not advance to another day. In this case "number week" and "dayname" are two distinct blocks. (Example: "+1 week wednesday july 23rd, 2008" means "2008-07-30").
  4. "ordinal dayname" does advance to another day. (Example "first wednesday july 23rd, 2008" means "2008-07-30").
  5. "number week ordinal dayname" will first add the number of weeks, and then advances to another day. In this case "number week" and "ordinal dayname" are two distinct blocks. (Example: "+1 week first wednesday july 23rd, 2008" means "2008-08-06").
  6. "ordinal dayname 'of' " does not advance to another day. (Example: "first wednesday of july 23rd, 2008" means "2008-07-02" because the specific phrase with 'of' resets the day-of-month to '1' and the '23rd' is ignored here).

Also observe that the "of" in "ordinal space dayname space 'of' " and "'last' space dayname space 'of' " does something special.

  1. It sets the day-of-month to 1.
  2. "ordinal dayname 'of' " does not advance to another day. (Example: "first tuesday of july 2008" means "2008-07-01").
  3. "ordinal dayname " does advance to another day. (Example: "first tuesday july 2008" means "2008-07-08", see also point 4 in the list above).
  4. "'last' dayname 'of' " takes the last dayname of the current month. (Example: "last wed of july 2008" means "2008-07-30")
  5. "'last' dayname" takes the last dayname from the current day. (Example: "last wed july 2008" means "2008-06-25"; "july 2008" first sets the current date to "2008-07-01" and then "last wed" moves to the previous Wednesday which is "2008-06-25").

Note:

Relative month values are calculated based on the length of months that they pass through. An example would be "+2 month 2011-11-30", which would produce "2012-01-30". This is due to November being 30 days in length, and December being 31 days in length, producing a total of 61 days.

Note:

number is an integer number; if a decimal number is given, the dot (or comma) is likely interpreted as delimiter. For instance, '+1.5 hours' is parsed like '+1 5 hours', not as '+1 hour +30 minutes'.

更新日志

版本说明
5.6.23, 7.0.8Weeks always start on monday. Formerly, sunday would also be considered to start a week.
5.3.3"first day" and "last day" changed to behave has "+1 day" and "-1 day", respectively. Previously, the behaviour was as "first day of" and "last day of".