anniversary (n.)
- bicentenary
- bicentennial
- biennial
- birthday
- celebration
- centenary
- centennial
- ceremony
- commemoration
- fanfare
- festivity
- holiday
- jubilee
- memorialization
- memory
- observance
- ovation
- quincentenary
- quincentennial
- rejoicing
- remembrance
- revel
- rite
- salute
- salvo
- sesquicentennial
- solemnization
- tercentenary
- tercentennial
- testimonial
- toast
- tribute
- triennial
- triumph