"Fri, 02 Jan 1970 01:21:50"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700102
Only TIME
01:21:50
General datetime
1970-01-02 01:21:50Z
For Database
1970-01-02 01:21:50
For HTTP1.1
Fri, 02 Jan 1970 01:21:50 GMT