"Fri, 02 Jan 1970 00:56:54"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700102
Only TIME
00:56:54
General datetime
1970-01-02 00:56:54Z
For Database
1970-01-02 00:56:54
For HTTP1.1
Fri, 02 Jan 1970 00:56:54 GMT