March beginning to provide opportunity for celebration (2,6,3)

I believe the answer is:

st davids day

I believe this is a double definition.

'march beginning' is the first definition.
(St David's Day is 1st March)

'opportunity for celebration' is the second definition.

'to provide' is the link.

(Another definition for st davids day that I've seen is " big date with Myfanwy?".)

I've seen this clue in The Times.

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