In a first come, first serve fashion, the Mandarin restaurant chain is offering a free buffet for citizens on Canada Day as part of its 40th anniversary, the company said in an announcement on Monday.

All that is needed is proof of citizenship — this can be a birth certificate, passport or other ID. Doors open at 12 p.m. on July 1 and close at 8:30 p.m.

Customers will also receive complimentary soft drinks, tea and coffee in addition to their meal, the Ontario-based buffet chain said in a news release.