Who attend the seminar in September?

Study the following information carefully to answer the given question: Eight persons – L, G, A, E, M, Z, N and F have attend seminar on three different dates on 6, 13, 21 of the months of July, September and December of year 2020. No two persons attend the seminar on the same date of the same month. One of the dates of in the given months is a holiday. E attends seminar on even numbered date of a month which has odd number of days. Holiday is come in a date of 21st of the month. Only three persons attend seminar between L and E. Less than five persons between G and Z. M attends seminar immediately after N. N does not attend the seminar in December. F attends before
A. F and G are adjacent. Two people between A and E. F is not the first person to attend the seminar.