NtpTest.exe could be used to validate the time from a time server.
The test queries a time server and compare received time with localtime.
The return value is a number. 0 for testFail or 100 for testPass.

Syntax
ntptest.exe timeout retries n.n.n.n:p

Example
ntptest.exe 4 1 192.168.10.220:37

if the diff between server time and local time is <= 3 secs the return value = 100
if the diff between server time and local time is > 3 secs the return value = 0
if the server does not respond the return value = 0

To run in debug mode you should create a file named ntpdebug.txt
in the same directory as ntptest.exe


NB!
In SNMPc you must use a Timeout Value that is a little longer than
timeout x (retries + 1).

In the example above this is 8 secs, so use Timeout=10 in SNMPc.

Always use Retries=0 in SNMPc.