"Sun, 01 Feb 1970 07:14:16"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700201
Only TIME
07:14:16
General datetime
1970-02-01 07:14:16Z
For Database
1970-02-01 07:14:16
For HTTP1.1
Sun, 01 Feb 1970 07:14:16 GMT