The Voice of the Martyrs is giving away a free 2024 prayer calendar. They ask for a donation on the freebie confirmation screen, but you can ignore it and still get your free calendar.
For each day of the year, a specific prayer request is provided for one of the restricted nations or hostile areas where Christians are persecuted today.
I've requested this in years past and they will email you a lot soliciting donations, so be sure to use your freebie email address!