Perry's Index to the Aesopica
Perry reserves 441 for an anecdote about the "feast day" and
the "day after" found in Plutarch's Life of Themistocles
You can find a compilation of Perry's index to the Aesopica in the gigantic appendix to his
edition of Babrius and Phaedrus for the Loeb Classical Library
(Harvard University Press: Cambridge, 1965). This book is an absolute must for anyone interested
in the Aesopic fable tradition. Invaluable.