Kaarawan ko ngayon. Kaarawan ko ngayong araw na ito.

Ngayon ay aking kaarawan❤️

If you want to say it in a fluent Tagalog then you would say: "Ngayon ang aking kaarawan" If you want to make it sound more natural you would say: "Kaarawan ko ngayon" or just say "Birthday ko ngayon" since the word birthday is commonly used more often than its Tagalog counterpart.

ngayon ang aking kaarawan