"Tue, 20 Jan 1970 01:00:37"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700120
Only TIME
01:00:37
General datetime
1970-01-20 01:00:37Z
For Database
1970-01-20 01:00:37
For HTTP1.1
Tue, 20 Jan 1970 01:00:37 GMT