"Tue, 03 Feb 1970 00:52:23"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700203
Only TIME
00:52:23
General datetime
1970-02-03 00:52:23Z
For Database
1970-02-03 00:52:23
For HTTP1.1
Tue, 03 Feb 1970 00:52:23 GMT