"Tue, 06 Jan 1970 04:40:22"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700106
Only TIME
04:40:22
General datetime
1970-01-06 04:40:22Z
For Database
1970-01-06 04:40:22
For HTTP1.1
Tue, 06 Jan 1970 04:40:22 GMT