"Sat, 10 Jan 1970 19:42:51"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700110
Only TIME
19:42:51
General datetime
1970-01-10 19:42:51Z
For Database
1970-01-10 19:42:51
For HTTP1.1
Sat, 10 Jan 1970 19:42:51 GMT