How to make a calendar in ics, vcs, pst formats?

Question

Calendar

It is necessary to make a production calendar in all formats available for import into the main calendar programs. As I understand it, these are Outlook (.pst), iCalendar (.ics) and vCalendar (.vcs). How and with the help of which utility / service to quickly and reliably (and preferably, free of charge) generate calendars in all formats?
Thank you.