This is the 178th most frequent Indonesian word.
tanggal
"Date" (as in calendar date).
In this sentence, 'tanggal' functions as a date indicator, specifying the day of the month.
Hari ini adalah tanggal 15 Mei.
Today is May 15th.
'Tanggal' in this instance refers to the specific day within a date of importance or record, such as a birthday.
Dia menulis tanggal lahirnya di formulir.
She wrote her date of birth on the form.
Here, 'tanggal' is used to indicate a specific calendar day for planning a future event.