Lower price campaigns, scheduled price changes or early bird offers when bought before a specific date

Hi

How can I get Dolibarr to automatic change the price up or down of a particular product when a certain date or possible number of sales are done?

For our spring workshop, we were thinking of having an early bird price for all those that orders before January 1st, and automatically have Dolibarr adjust the price up for every order after January 1st.

When I look at the picture of a services selling price, then it has a column that says “Applied from”. Are there any way to get an “Applied to” date as well?

Another way could be that the first 100 people get a lower price, and then buyers after that pays more, but right now we are more interested in the date discount.

JonB