Yes. There is some evidence in the bible that Jesus, and his disciples, often prayed in the morning hours. However, there is no specific commandment in the bible to do so.
There is no “one size fits all” answer to this question. Guidelines have probably been established in the by-laws of the church so you check them. Each church should be set up according to government regulations.
Unfortunately too many preachers today use organization affiliation as their only means of fellowship with other preachers. There is no one organization that is the “body of Christ” so to speak. It is important of course that you fellowship with men of like precious faith but no preacher should be rejected on the basis of the organization he belongs to.
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