"Thu, 08 Jan 1970 04:36:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700108
Only TIME
04:36:21
General datetime
1970-01-08 04:36:21Z
For Database
1970-01-08 04:36:21
For HTTP1.1
Thu, 08 Jan 1970 04:36:21 GMT