Incorrect error message on procedure date planing

STR: Create procedure with incorrect date (too early). Got message: "startDate": "Auction start date have to be not earlier than 2019-12-14 20:00:00.000000"

But if 2019-12-14 20:00:00.000000 passed, got "startDate": "Auction start date have not to be in weekend or holiday".

So, the first message suggest incorrect auction.startDate, but second error doesn`t offer correct startDate.

Proposal: calculate startDate taking holidays into account, and leave only 1 type of error message with (closest to posted) valid startDate.