Whilst it is clear rewards have to be earned in the calendar year when they afe selected is a different issue so if you earned a reward today you have 92 days (so until 10th Feb 23) to select it.

Though it's hard to tell at the moment. When rewards started anyone who had qualified before the scheme formally launched had their 3 months start then to be selected by early September. I earned a further reward at the end of August with a select date at the end f November. Then the hack hit and those dates were all extended to 31st December. I've not earned a reward since then but I would assume they have reverted to the 92 days from award to selection.

If people have earned a reward since early September it would be useful if they could post the earned and select by dates.