A free program for Android, by Digit Grove.

Calendar 2022 – Diary Holidays and Reminders is a free calendar app that has a state-of-the-art design and also has a perfect blend of productivity. It helps you manage your schedule, events, appointments, notes, and daily tasks.

It has a beautiful UI and an easy-to-use interface. You can create and manage events, write down your thoughts and ideas, keep track of your schedule, set reminders, etc. 

Calendar 2022 – Diary Holidays and Reminders can also be used as a holiday calendar, as it has a very easy-to-use interface and can be used to set the date and mark the days for each month.