"Tue, 03 Feb 1970 19:46:23"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700203
Only TIME
19:46:23
General datetime
1970-02-03 19:46:23Z
For Database
1970-02-03 19:46:23
For HTTP1.1
Tue, 03 Feb 1970 19:46:23 GMT