Being a staple food causes red meat prices to be scrutinized in various aspects. Although the seasonal effects yielded from the fixed dated events are relatively easy to detect, it is harder to observe the impacts of events shifting to a different date each year. In this paper, the effect of the Feast of Sacrifice on red meat prices is evaluated by transforming the price series of the Gregorian calendar into the Hijri calendar in which the feast is fixed at a date and comparing the monthly price changes of two calendars. It is observed that the price changes are concentrated in some Hijri periods. The red meat prices increase most in Ramadan and previous months but not during the Feast of Sacrifice, when the demand for sacrificial animals is high, and increase least in the second month after the feast. The observation confirms the claim that the sacrificial animals are not put on the market beforehand by expecting a higher profit during the feast of sacrifice; however, the remainders are sold out in a few months at low rates to avoid the care cost.