I'm trying to create a subscription button but I want the subscription to start on the 10th of the month (either the current month before the 10th or the following month if it's after). Can the start date be set or do I have to do some crafty work with trial periods?
If you use the PayPal subscription buttons then you don't have the option to specify the start date for the profile but in this case you can do some calculations to give trial periods so that profile starts at same time.
In case you are ready to make use of PayPal API's to create the recurring profile then you can specify the start date for your recurring Profile and you have more control on the profiles created .You can refer the below links for more info .