1 A.M.

1 A.M., 1am, One A.M., or variations thereof may refer to: * A time on the 12-hour clock * 1 am = 1 attometre (a very small distance) * Orders of magnitude (length), a comparative scale regime at 1 attometer * Aircraftman, 1st class (1AM) in the Royal New Zealand Air Force

1 A.M.

1 A.M., 1am, One A.M., or variations thereof may refer to: * A time on the 12-hour clock * 1 am = 1 attometre (a very small distance) * Orders of magnitude (length), a comparative scale regime at 1 attometer * Aircraftman, 1st class (1AM) in the Royal New Zealand Air Force