I think based on the trip cancellations and other stuff the window of attack is anywhere from May 6 to May 12. If one were to stretch it. Then till May 20.
Btw gotta remember that, yesterday the news came of simulatenous cancellation of program of President's Shimla program and PM's Moscow program. After the cabinet meeting was over. Something is definitely cooking. Moreover, I believe it can happen before May 9. So that leaves 3 days. May 6, 7 and 8. Probably May 6 or 7.
Btw here's a tidbit.
Post galwan which happened on June 15, 2020.

Diplomatic Engagements
June 17, 2020: External Affairs Minister S. Jaishankar held a telephonic conversation with his Chinese counterpart, Wang Yi, emphasizing the need for de-escalation and adherence to existing agreements.
June 22, 2020: Senior military commanders from both sides met to discuss disengagement strategies, leading to a mutual agreement on de-escalation in certain sectors.
No such thing has happened wrt to pakis. Intent is clear. Punish pakis.