"Thu, 01 Jan 1970 21:11:07"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700101
Only TIME
21:11:07
General datetime
1970-01-01 21:11:07Z
For Database
1970-01-01 21:11:07
For HTTP1.1
Thu, 01 Jan 1970 21:11:07 GMT