We often use in our sentences words like today, tomorrow and day after tomorrow whenever we referring to a day. So, let us try to learn such kind of words in Sanskrit.
Let us start with simple ones. Let us say you want to say, today is friday. That would be in Sanskrit 'adya shukravaasaraha अद्य शुक्रवासरः' where, adya (अद्य) means today and shukravaasarha (शुक्रवासरः) means Friday.
How about saying tomorrow is saturday? Of course it has to be saturday tomorrow if it is Friday today!
Tomorrow is Saturday. ' shvaha shanivaasaraha (श्वः शनिवासरः)
That makes the day after tomorrow a Sunday after all!
Day after tomorrow is Sunday. 'parashvaha bhaanuvaasaraha (परश्वः भानुवासरः)
What about coming Monday then? A day after the day after tomorrow?
The day after day after tomorrow is Monday. 'praparashavaha somavaasaraha
(प्रपरश्वः सोमवासरः )
By the way, we haven't learned yet how to refer yesterday yet, have we?
That would be 'hyaha' (ह्यः).
Yesterday was Thursday. 'hyaha guruvaasarha (ह्यः गुरुवासरः)
That's enough for now. You have learnt hyaha (yesterday), adya (today), shvaha (tommorow), parashvaha (day after tomorrow) and praparashavaha (day after the day after tomorrow) all at once. Similarly day before yesterday is parahyaha (परह्यः) and day before the day before yesterday is praparahyaha (प्रपरह्यः) in sanskrit.
Go use it in your own sentences. The whole sentence does not necessarily be in Sanskrit. Use these words along with the words with the language that you are comfortable with.
Learning is a great experience. It's lot of fun. It's not just about what we learn but it's all about how much fun that our brain cells get during the process.