I suggest you have the cleaning already on Saturday 10th and card making day Sunday 11th, so that they are all ready to be posted latest on Wednesday 14th.
Monica Dunkley's children's artwork :-) I love these :-)
It might also be a good idea to celebrate Ostara a couple of days beforehand, so that you can have a peaceful celebration.
But - you need to start thinking about this. Four weeks to Ostara. 30 days. You wouldn't be as calm and collected if it was last week of November ;-)
BTW, you need to prepare the countdown calendar...