2a) A special distant date But I'd rather go for 2038, most likely 2^31-1 seconds since 1970 UTC, because the whole 2037 is still completely valid. I think this would be as close to due-less as calendar-backend permits. Such tasks would not have their date displayed in Qalendar. @jackburton: I installed MaeCalTasks to see exactly how it works, but If the screenshot is from 1.0.0-5, then I am doing something wrong or there's a bug, because I don't see the buttons with "X", "Today" and "Tomorrow".
I also have a question: was 2037 just simpler to use? Or is it to allow also the stock calendar to set such date? I guess It would be nice if Qalendar was compatible with MaeCalTasks in this matter, but I see no definitive reason to choose 2037 over 2038.
Or is that X button just a shortcut to toggle the year and 2037 tasks do not get any kind of special treating (2b)? 2b) Just a distant date There would be a shortcut to set the date to 2037 and that's it. I think it would feel like a quick hack, so I do not really like it.