Here's the last year's worth of holidays on top of the price chart...
It would be a lot easier to pinpoint the dates if you could select specific dates for the charts, but this is the best I could do for the 1 year chart.
Last year, Heritage Day landed on August 1, just before the chart starts. The end of the chart represents this year's long weekend.
The green bar represents when most Calgary schools were on spring break. Although not technically a holiday, I also included the start of Stampede Week.
Last year, Labour Day was in the middle of a period where the price was declining.
In addition to this week, there were price jumps prior to Thanksgiving, Christmas, New Year's, Easter, Canada Day, and Stampede. There was a jump just prior to Mother's Day too.
There was also a jump at the end of the Family Day weekend, and jumps during Spring Break and the Victoria Day weekend.