"Tue, 13 Jan 1970 19:45:53"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700113
Only TIME
19:45:53
General datetime
1970-01-13 19:45:53Z
For Database
1970-01-13 19:45:53
For HTTP1.1
Tue, 13 Jan 1970 19:45:53 GMT