Date Formatting Symbols for date()

a

am or pm

A

AM or PM

B

Swatch Internet Time (between 000 and 999)

c

Date in ISO 8601 format

d

Day of month (from 01 to 31)

D

Day of week (from Mon to Sun)

F

Month (from January to December)

g

Hour (from 1 to 12)

G

Hour (from 0 to 23)

h

Hour (from 01 to 12)

H

Hour (from 00 to 23)

i

Minutes (from 00 to 59)

I

Whether date is in DST (1) or not (0)

j

Day of month (between 1 and 31)

l

Day of month (from Sunday to Saturday)

L

Whether date is in a leap year (1) or not (0)

m

Month (from 01 to 12)

M

Month (from Jan to Dec)

n

Month (from 1 to 12)

O

Difference to GMT (for example, +0100 for one hour ahead)

r

Date in RFC 2822 format

s

Seconds (from 00 to 59)

S

Ordinal suffix for the day of month (st, nr, td, th)

t

Number of days in the provided month (from 28 to 31)

T

Time zone of server (for example, CET)

U

Epoche value (seconds since January 1^st, 1970, Midnight GMT)

w

Day of week (from 0Sunday, to 6Saturday)

W

Week number (according to ISO 8601, from 1 to 53)

y

Year (two digits)

Y

Year (four digits)

z

Day of year (from 0 to 365)

Z

Time zone difference to UTC (in seconds)