"Tue, 06 Jan 1970 19:40:27"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700106
Only TIME
19:40:27
General datetime
1970-01-06 19:40:27Z
For Database
1970-01-06 19:40:27
For HTTP1.1
Tue, 06 Jan 1970 19:40:27 GMT