"Fri, 02 Jan 1970 19:44:23"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700102
Only TIME
19:44:23
General datetime
1970-01-02 19:44:23Z
For Database
1970-01-02 19:44:23
For HTTP1.1
Fri, 02 Jan 1970 19:44:23 GMT