This is a three part cache hidden on Canada Day 2019 by a bunch of Americans. :)
You will find the waypoints at your first stop for the second stage of the series.
For the missing number in the clue, fill in the X:
The year: 19X6 – Women win the right to vote in Manitoba, Saskatchewan, and Alberta
For the third and final cache in the series, your clue is:
May 2, 16XX – King Charles II of England signs the charter incorporating the Hudson’s Bay trading company.