strtotime « String « PHP

1.Calculating a date interval with strtotime()
2.Checking a date range strtotime ( string time [, int now] ) converts strings to a timestamp
4.Using strtotime()
5.Using strtotime() with a starting epoch timestamp
6.Find the First monday on or after November 1, 2008
7.Find weekday
8.Finding the Date for a Weekday
9.Getting the Day and Week of the Year

10.If PHP is unable to convert your string into a timestamp, it will return -1.
11.Obtaining the Difference Between Two Dates
12.Subtracts a year from a given timestamp