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Format characters for use in date( )
Format character Description Example
a Lowercase am/pm am or pm
A Uppercase am/pm AM or PM
B Swatch Internet Time 000 to 999
c ISO 8601 date, time, and time zone 2004-06-18T09:26:55+01:00
d 2-digit day of month, leading zeros 01 to 31
D Day string, three letters Mon, Thu, Sat
F Month string, full January, August
g 12-hour clock hour, no leading zeros 1 to 12
G 24-hour clock hour, no leading zeros 0 to 23
h 12-hour clock hour, leading zeros 01 to 12
H 24-hour clock hour, leading zeros 00 to 23
i Minutes with leading zeros 00 to 59
I Is daylight savings time active? 1 if yes, 0 if no
j Day of month, no leading zeros 1 to 31
l Day string, full Monday, Saturday
L Is it a leap year? 1 if yes, 0 if no
m Numeric month, leading zeros 01 to 12
M Short month string Jan, Aug
n Numeric month, no leading zeros 1 to 12
O Difference from GMT 200
r RFC-822 formatted date Sat, 22 Dec 1979 17:30 +0000
s Seconds, with leading zeros 00 to 59
S English ordinal suffix for day number st, nd, rd, or th
t Number of days in month 28 to 31
T Time zone for server GMT, CET, EST
U Unix Timestamp 1056150334
w Numeric day of week 0 (Sunday), 6 (Saturday)
W ISO-8601 week number of year 30 (30th week of the year)
y Two-digit representation of year 97, 02
Y Four-digit representation of year 1997, 2002
z Day of year 0 to 366
Z Time zone offset in seconds -43200 to 43200