"Sun, 08 Feb 1970 14:57:08"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700208
Only TIME
14:57:08
General datetime
1970-02-08 14:57:08Z
For Database
1970-02-08 14:57:08
For HTTP1.1
Sun, 08 Feb 1970 14:57:08 GMT