Firstly- this script was originally written by Mascovy. I've left his name in the script and calendar display itself as the concept is his as should be the credit.
I've modified the script so that it no longer retrieves days of the week using mirc built in $asctime. But rather through a set of calculations which I had to fiddle with till I finally got it right.
By switching to calculations, the calendar can go back as for as the year 1ad (not that anyone would have any need for that), but more importantly, it's not limited to the maximum year 2037 any more.
You can use the pop-ups to access the calendar.
alternatively, /my.calender