"Sat, 10 Jan 1970 15:05:55"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700110
Only TIME
15:05:55
General datetime
1970-01-10 15:05:55Z
For Database
1970-01-10 15:05:55
For HTTP1.1
Sat, 10 Jan 1970 15:05:55 GMT