"Sat, 10 Jan 1970 19:44:53"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700110
Only TIME
19:44:53
General datetime
1970-01-10 19:44:53Z
For Database
1970-01-10 19:44:53
For HTTP1.1
Sat, 10 Jan 1970 19:44:53 GMT