Allāh ﷻ says in the Holy Qur’ān that all living things are made of water. There is no life, no cleanliness, no īmān (faith) without water. Water is pure and clean. Those who pollute it are cursed. It will not be made pure again until the coming of Sayyidunā Mahdī (as).
Allāh ﷻ Chooses Place, Time, and People
Mar27 2019 Turkish 13min
It is Allāh ﷻ who makes a time or a place or a person holy. It is not up to what we think or what is convenient. These holy months change according to the moon calendar. He ﷻ makes them holy as He ﷻ has also chosen Mecca and Medina; as He ﷻ has chosen the Prophet ﷺ and his Ṣaḥābah. We cannot change this.