तारीख को

on [a date]

→ तारीख
phrase Rare #7,076
on [a date] Used with a day of the month to say when something happens. को marks the date as a point in time.
HI: मैं पाँच तारीख को वापस आऊँगा।
EN: I’ll come back on the fifth.

फिर आठ और नौ तारीख को घुस गए।

Then they entered on the 8th and 9th.

— Black Friday (2004)

यानी सोलह तारीख को रजिस्टर होती है जिसकी कभी कोई पूछताछ नहीं होती।

In other words, it’s registered on the sixteenth, and no one ever asks about it.

— Raat Akeli Hai (2020)

मैं दो तारीख को देता हूँ, राजू।

I’ll give it to you on the second, Raju.

— Superboys of Malegaon (2025)