Q last changed their trip (before today) on May 8. The password they chose was "NowC@mesTHEP@in– -23".
Q posted the Singapore picture May 10 and the Summit was publicly announced to be in Singapore the same day.
This means that Q planned to out their password on this day and point to the date of the summit when they last changed on May 8
Password outed today, 23 days before the summit. Declassified docs coming sometime within a few days.