"Today is Friday the thirteenth."
Translation:Dnes je pátek třináctého.
Thanks to both of you for taking the time to reply!
I might be a little more confused, so here is my follow-up...
If I want to say TODAY IS THE FOURTH or THURSDAY IS THE FOURTH, I would say "XXX je čvrtého."
But if I want to say TODAY IS JANUARY FOURTH, or SATURDAY IS JANUARY FOURTH, I would say "XXX je čtvrtý ledna."
(Tell me if this is right or wrong, please?)
Yeah, sorry, for my earlier confusing, it feels unnatural to me, but it's subjective and it is correct.
As for your question - you cannot combine the nominative and genitive. You have to use the same for both the day and the month. So it's either "XXX je čtvrtý leden" or "XXX je čtvrtého ledna"