Syntax of date in PHP
string date(string format[, int timestamp])
Formats a time and date according to the format string provided in the first parameter. If the second parameter is not specified, the current time and date is used. The following characters are recognized in the format string:
a “am” or “pm”
A “AM” or “PM”
B Swatch Internet time
d Day of the month as two digits, including a leading zero if necessary; e.g., “01” through “31”
D Name of the day of the week as a three-letter abbreviation; e.g., “Mon”
F Name of the month; e.g., “August”
g Hour in 12-hour format; e.g., “1” through “12”
G Hour in 24-hour format; e.g., “0” through “23”
h Hour in 12-hour format, including a leading zero if necessary; e.g., “01” through “12”
H Hour in 24-hour format, including a leading zero if necessary; e.g., “00” through “23”
i Minutes, including a leading zero if necessary; e.g., “00” through “59”
I “1” if Daylight Savings Time; “0” otherwise
j Day of the month; e.g., “1” through “31”
l Name of the day of the week; e.g., “Monday”
L “0” if the year is not a leap year; “1” if it is
m Month, including a leading zero if necessary; e.g., “01” through “12”
M Name of the month as a three-letter abbreviation; e.g., “Aug”
n Month without leading zeros; e.g., “1” to “12”
r Date formatted according to RFC 822; e.g., “Thu, 21 Jun 2001 21:27:19 +0600”
s Seconds, including a leading zero if necessary; e.g., “00” through “59”
S English ordinal suffix for the day of the month; either “st”, “nd”, or “th”
t Number of days in the month, from “28” to “31”
T Time zone setting of the machine running PHP; e.g., “MST”
u Seconds since the Unix epoch
w Numeric day of the week, starting with “0” for Sunday
W Numeric week of the year according to ISO 8601
Y Year with four digits; e.g., “1998”
y Year with two digits; e.g., “98”
z Day of the year, from “0” through “365”
Z Time zone offset in seconds, from “–43200” (far west of UTC) to “43200” (far east of UTC)
Any characters in the format string not matching one of the above will be kept in the resulting string as is. If a nonnumeric value is provided for timestamp, then false is returned and a warning is issued.