"Sat, 03 Jan 1970 17:10:57"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700103
Only TIME
17:10:57
General datetime
1970-01-03 17:10:57Z
For Database
1970-01-03 17:10:57
For HTTP1.1
Sat, 03 Jan 1970 17:10:57 GMT