Job not executing on Time on Recurance

RecurringJob.AddOrUpdate(() => EmailUtil.SendEmails(), “50 13 30 11 *”);

I am using above crone for executing my SendEmail function.
I have run my application around 13:00 on 30/11/2017. so my function executes instantly instead of 13:50.

Can anyone suggest me where i am wrong?

It seems your expression is invalid try using below URL to generate CORN Express:
Hope this will help.

50 13 30 11 * is correct Expression.
It is not giving Invalidate expression.
Is there neceessary to add TimeZoneInfo?

No timezones info is not required