Hello, I'd first like to say I'm sorry if this is a question already answered somewhere else - I am new to this FT and am still having a hard time navigating!

I am also new to travelling with points, and I have a lot of Aeroplan points to be redeemed for EK J class, but of course I can't find a date that I want.
I want to remain flexible but if I was to redeem my points for an available date, and an awards seat pops up on a different date that I prefer more, am I able to change the dates after redemption?

Thank you