"Tue, 13 Jan 1970 05:29:42"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700113
Only TIME
05:29:42
General datetime
1970-01-13 05:29:42Z
For Database
1970-01-13 05:29:42
For HTTP1.1
Tue, 13 Jan 1970 05:29:42 GMT