ALL RELIGIONs-----What is best time period for practice of meditating on Name of God and purification of mind?

The best time is always. I'll tell you how you can do it always. You always have time ti think to yourself, why don't you make those thoughts a conversation with God. Meditating on the things as you do them will really help you out. Think good thoughts instead of nothing because the devil will fill that blank space with evil if it is not filled with God's word.