on the dot
US /ɑn ðə dɑt/
UK /ɑn ðə dɑt/

1.
tepat waktu, persis
exactly at the specified time
:
•
The train arrived at 10:00 AM on the dot.
Kereta tiba pukul 10:00 pagi tepat waktu.
•
She always starts her meetings at 9:00 AM on the dot.
Dia selalu memulai rapatnya pukul 9:00 pagi tepat waktu.