Editing Line 1 Yonge–University (section)

=== Operation hours and frequency ===
As with other TTC subway lines, Line 1 operates most of the day and is generally closed between 2:00&nbsp;a.m. and 6:00&nbsp;a.m. [[Eastern Time Zone|EST]] on weekdays and Saturdays, and between 2 a.m. to 8 a.m. on Sunday. Trains arrive at stations every 2 to 3 minutes during peak periods and every 4 to 5 minutes during off-peak periods.<ref>{{Cite web |url=http://ttc.ca/Subway/Stations/Union/station.jsp |title=TTC Union Station |access-date=February 4, 2015 |archive-date=January 31, 2016 |archive-url=https://web.archive.org/web/20160131145544/http://ttc.ca/Subway/Stations/Union/station.jsp |url-status=dead }}</ref><ref>{{cite web |url=https://www.ttc.ca/routes-and-schedules#/1/0/14111 |title=Finch Station |access-date=August 28, 2022 |archive-date=October 30, 2021 |archive-url=https://archive.today/20211030140956/https://www.ttc.ca/routes-and-schedules%23/listroutes/bus#/1/0/14111 |url-status=live }}</ref>

During the morning peak, from 6:00&nbsp;am to 9:00&nbsp;am Monday to Friday, half the trains are turned back at [[Glencairn station]] resulting in limited service north of that point. The turnback was moved from [[St. Clair West station]] to Glencairn station in 2016,<ref>{{cite web |url=https://stevemunro.ca/2016/08/11/ttc-service-changes-effective-sunday-september-4-2016/ |title=TTC Service Changes Effective Sunday, September 4, 2016 (Updated) |date=September 4, 2016 |access-date=May 7, 2019 |last=Munro |first=Steve |work=stevemunro.ca |author-link=Steve Munro |archive-date=May 8, 2019 |archive-url=https://web.archive.org/web/20190508014155/https://stevemunro.ca/2016/08/11/ttc-service-changes-effective-sunday-september-4-2016/ |url-status=live }}</ref> and plans called for it to be moved farther to [[Pioneer Village station]] in December 2017 when the Line 1 extension opened.{{citation needed|date=May 2019}}

Overnight service on the Yonge segment of the line is provided by 320 Yonge Blue Night from [[Queens Quay (Toronto)|Queens Quay]] to [[Steeles Avenue]] with headways of 3 to 15 minutes. The University segment does not have an overnight service.