Noted what people did to mark a special occasion (10)
I believe the answer is:
celebrated
'noted' is the definition.
(synonyms)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for celebrated that I've seen before include "Publicly honoured" , "Did something enjoyable (to mark an event)" , "Eminent" , "Cheered" , "Rejoiced - famous" .)