It's to honour all our frontline workers fighting the spread of Covid-19
It's part of the annual National Services Day, which this year pays special tribute to the victims of Covid-19 as well as health workers.
Usually hundreds of frontline workers take to the streets to mark the day, but because of the pandemic, the event has been scaled down.
The Army Air Corps will conduct a flyover over Collins Barracks where a small ceremony will take place.