TidyCal

I was looking for a cheaper alternative to acuity or even caledly to be integrated in my Squarespace account.
Found it - tidycal seems to be rather perfect, even with the PayPal integration.
Right now, I miss only a few features:
- primarily: background colour of calender, if I can't chance it in future, I'll look for alternatives, because it absolutely disturbes my website design.
- change of font - kind & size, also important for design.
Nice2have, but interesting:
- I'd rather like more than one PayPal integrations, to have the opotion for several, different donation channels to offer.