Date

• dday of the month, 2 digits with leading zeros; i.e. "01" to "31"
• jday of the month without leading zeros; i.e. "1" to "31"
• SEnglish ordinal suffix for the day of the month, 2 characters; i.e. "th", "nd"
• tnumber of days in the given month; i.e. "28" to "31"

Day

• Dday of the week, textual, 3 letters; i.e. "Fri"
• l (lowercase 'L')day of the week, textual, long; i.e. "Friday"
• wday of the week, numeric, i.e. "0" (Sunday) to "6" (Saturday)

Month

• Fmonth, textual, long; i.e. "January"
• mmonth; i.e. "01" to "12"
• Mmonth, textual, 3 letters; i.e. "Jan"
• nmonth without leading zeros; i.e. "1" to "12"

Year

• Yyear, 4 digits; i.e. "1999"
• yyear, 2 digits; i.e. "99"

Hour

• ghour, 12-hour format without leading zeros; i.e. "1" to "12"
• Ghour, 24-hour format without leading zeros; i.e. "0" to "23"
• hhour, 12-hour format; i.e. "01" to "12"
• Hhour, 24-hour format; i.e. "00" to "23"

Minute

• iminutes; i.e. "00" to "59"

Second

• sseconds; i.e. "00" to "59"

am /pm

• a"am" or "pm"
• A"AM" or "PM"

Units passed

• Useconds since the epoch
• zday of the year; i.e. "0" to "365"
• WISO-8601 week number of year, weeks starting on Monday (added in PHP 4.1.0) (Saturday)

Time zone

• I (capital i)"1" if Daylight Savings Time, "0" otherwise.
• Odifference to Greenwich time in hours; i.e. "+0200"
• Ttime zone setting of this machine; i.e. "MDT"
• Ztime zone offset in seconds (i.e. "-43200" to "43200"). The offset for time zones west of UTC is always negative, and for those east of UTC is always positive.

Other

• BSwatch Internet time
• Lboolean for whether it is a leap year; i.e. "0" or "1"
• rRFC 822 formatted date; i.e. "Thu, 21 Dec 2000 16:01:07 +0200" (added in PHP 4.0.4)