"Sat, 03 Jan 1970 23:33:04"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700103
Only TIME
23:33:04
General datetime
1970-01-03 23:33:04Z
For Database
1970-01-03 23:33:04
For HTTP1.1
Sat, 03 Jan 1970 23:33:04 GMT