Actually it is the strawberry day

1/5 is ichi go ... ichigo ... いちご ... strawberry.
Meat is often on sale on the 29th of each month (ni kyu ... niku ... 肉 ... meat), it is especially tasty on Nov 29, 1 1 2 9, ii niku, which is how you would pronounce "nice meat".
But I am quite happy with 1/5 being the igo day
