"Tue, 13 Jan 1970 21:44:25"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700113
Only TIME
21:44:25
General datetime
1970-01-13 21:44:25Z
For Database
1970-01-13 21:44:25
For HTTP1.1
Tue, 13 Jan 1970 21:44:25 GMT