No. Perhaps: That calls for a treat! That calls for a celebration!
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BarbaraPAThat calls for a treat!That calls for a celebration!I would actually suggest using "this calls for a celebration/treat" for these, considering that the event must be happening in the present moment.
AnonymousI would actually suggest using "this calls for a celebration/treat"'This' is fine, but it is no better or more natural than Barbara's 'that'.