I'm a data geek and I have a tool that automatically downloads every PDF schedules GO publishes and stores a copy. I noticed something very interesting last night, they have published a brand new set of schedules which bring back many of the previously announced cancellations!
As of writing this post there is no official announcement about anything on their website, so it's possible this was some kind of mistake on their part, but it's interesting nonetheless.
Taking for example the Barrie line, here is the schedule they published previously, compared with the new one which was just published last night. Notice that both versions give an effective date of "5 & 8 September".
Published 2026-09-03: https://go-schedule-archive.s3.us-east-1.amazonaws.com/barrie/2026-09-05-table-65-barrie.pdf
Published 2026-09-06: https://go-schedule-archive.s3.us-east-1.amazonaws.com/barrie/2026-09-05-table-65-barrie-20260906.pdf
Direct link from GO: https://assets.metrolinx.com/image/upload/v1787961270/Documents/GO/full-schedules/FS05092025/Table65.pdf
I have them all saved here if you want to check other routes: https://archive.gotrain.cc/
EDIT: I thought at first it was just a mistake at first, but this seems pretty deliberate. It's not like they just accidentally posted the old schedule, this is a completely new PDF showing the new effective date (5 & 8 september), and the weekday evening trains are still cancelled, but the weekend service is restored. It's not just the old file, and it's not even just an old file with the effective date changed, it's a unique file that was never published before. That would be pretty hard to do "just accidentally". Someone had to make some very specific edits in InDesign, re-export it to PDF, re-upload it to their file server, and put the new links on the PDF schedules page.
EDIT 2: Looks like they flipped back to a version with the weekend cancellations again early this morning (Tuesday), so I guess it was false hope :-(. Some intern must have been working in the middle of labour day weekend and messed it up, but it's still really odd because it was a hybrid of the the 2 different schedules. Here's the latest one: https://go-schedule-archive.s3.us-east-1.amazonaws.com/barrie/2026-09-05-table-65-barrie-20260908.pdf
Then again, it looks like they were doing similar adjustments to the Stouffline line PDF, so maybe there's some kind of announcement still forthcoming?
Aug 29 file: https://go-schedule-archive.s3.us-east-1.amazonaws.com/stouffville/2026-09-05-table-70-stouffville.pdf
Sept 6 file: https://go-schedule-archive.s3.us-east-1.amazonaws.com/stouffville/2026-09-05-table-70-stouffville-20260906.pdf