"Fri, 02 Jan 1970 12:31:45"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700102
Only TIME
12:31:45
General datetime
1970-01-02 12:31:45Z
For Database
1970-01-02 12:31:45
For HTTP1.1
Fri, 02 Jan 1970 12:31:45 GMT