"Mon, 23 Feb 1970 07:13:22"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700223
Only TIME
07:13:22
General datetime
1970-02-23 07:13:22Z
For Database
1970-02-23 07:13:22
For HTTP1.1
Mon, 23 Feb 1970 07:13:22 GMT