"Fri, 13 Feb 1970 14:57:19"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700213
Only TIME
14:57:19
General datetime
1970-02-13 14:57:19Z
For Database
1970-02-13 14:57:19
For HTTP1.1
Fri, 13 Feb 1970 14:57:19 GMT