How do I add CSDM or School of Math Seminars ical feeds to my iPhone/iPad?

To add CSDM Seminars iCal feeds:

For iPhones/iPads, please go to Settings > Passwords & Accounts > Add Account > Other > Add Subscribed Calendar > Enter https://www.ias.edu/ical/CSDM%20Seminars.ics

To add School of Math Seminars iCal feeds:

For iPhones/iPads, please go to Settings > Passwords & Accounts > Add Account > Other > Add Subscribed Calendar > Enter https://www.ias.edu/ical/Mathematics.ics