черствые именины

• ЧЕРСТВЫЕ ИМЕНЯНЫ coll

[NP; fixed WO]

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⇒ the day following the celebration of a person's name day, when people may come over to offer belated congratulations, eat food left over from the party etc:

- the day after s.o.'s name day;

|| приходить на чёрствые именины{{}}≈ come <go> over s.o.'s place for leftover birthday cake;

- come over etc to wish s.o. a belated happy name day.

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← The idiom refers to the fact that on the day after a party the cakes are already stale ("чёрствые").