"Tue, 13 Jan 1970 21:47:26"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700113
Only TIME
21:47:26
General datetime
1970-01-13 21:47:26Z
For Database
1970-01-13 21:47:26
For HTTP1.1
Tue, 13 Jan 1970 21:47:26 GMT