HP Sassoon(1) 31.9 :הוה ליה יומא טבא ולא איפשר מיפחת בה א̇ר̇בעא‏ : (if ) it was a holiday for him and he was unable to remove four (handbreadths from the covering of the sukkah)
See the entire entry for yōm ṭāḇ, yōmā ṭāḇā n.m. holiday