"Tue, 06 Jan 1970 12:02:52"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700106
Only TIME
12:02:52
General datetime
1970-01-06 12:02:52Z
For Database
1970-01-06 12:02:52
For HTTP1.1
Tue, 06 Jan 1970 12:02:52 GMT