Positioning of dates.

Positioning of dates.
 

Where in a sentence do I say when I am doing something?

In English I am able to say it two ways, for example:

"Tomorrow, I am going to my grandmothers" and "I am going to my grandmothers tomorrow"

Is this the same for Spanish?

I can say "Mañana, voy a la casa de mi abuela" but does "Voy a la casa de mi abuela mañana" also work?

If not could it be explained why?

Thanks! Dom

Tomorrow is an adverb, and it can go in either place you wrote it. An adverb is usually close to the verb in Spanish, where it can be more distant in English.