Comma Needed?

[frogboxer]

Do I need a comma after 'Tonight'? I know I can omit the word 'Tonight' but was curious about the punctuation.

Tonight 3 March 2013 at 7:50 pm, I received a call to investigate a $500 cash shortage ...


Thanks.

 

[Grumpy]

Yes. If you omit "Tonight", you should replace it with "On", which (obviously) would not require a comma after it.