What is the ruling on celebrating the birth of the Prophet, peace and blessings be upon him, and birthday celebrations, and Mother's Day, and Tree Week?

'Eid' is a name for everything that returns of a gathering on a regular basis. It includes a recurring day (like Friday and Eid al-Fitr), the gathering on that day, and the actions performed therein.

Any 'Eid' that is intended for devotion, drawing closer [to God], glorification, or imitation of the people of pre-Islamic ignorance or disbelievers, is a forbidden innovation (bid'ah). Examples include the Mawlid (Prophet's Birthday), Mother's Day, and national holidays, as they fall under the Prophet's (peace be upon him) saying: "Whoever innovates in this matter of ours that which is not from it, it will be rejected."

However, anything intended for organizing affairs for the benefit of the nation and managing its matters, such as academic schedules and work meetings, and is not intended for drawing closer [to God], worship, or glorification, falls under the category of customary innovations (bid'ah 'adiyah) that are not included in the prohibition; rather, they are permissible.