This is a transliteration into Tagalog of the English word.
bertdey
birthday
The native Tagalog word is kaarawan.
You could literally translate “Happy Birthday” as “Maligayang Kaarawan” though traditionally, the standard greeting had been “Maligayang Bati.”
Sinong may bertdey?
“Who has a birthday?”
=Whose birthday is it?
Sinong may bertdey sa Hunyo?
“Who has a birthday in June?”
Sinong may bertdey bukas?
Whose birthday is it tomorrow?
Sinong may bertdey sa Lunes?
Whose birthday is it on Monday?
