Simply because that's when their CERB is gonna end...
https://www.cbc.ca/news/canada/kitchener-waterloo/kitchener-citizenship-test-covid-1.5614933?fbclid=IwAR32trETpv4utFub_dKJdT4mvPbg2-pFWnpxrREIv8wo2QS-YJ2FYbj3bbE
read the first comment, it explains it all...