"Tue, 06 Jan 1970 19:43:49"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700106
Only TIME
19:43:49
General datetime
1970-01-06 19:43:49Z
For Database
1970-01-06 19:43:49
For HTTP1.1
Tue, 06 Jan 1970 19:43:49 GMT