"School Days" means the rule is in effect on all days that school is in session or open for any other activity, between 7 am - 4 pm. Here's what NYC311 has to say: "Parking is allowed in school zones when school is in recess. Parking restrictions would remain in effect. However, you should be aware that specific schools may be open on holidays and summer vacations. Parking restrictions remain in effect while schools are doing remote learning. Also, when schools are open for summer sessions, teacher meetings, or similar activities, the parking regulations apply on such days, even if students aren't attending. You should contact the specific school to verify that it's in recess. To look up information for a public school, go to the School Finder page.