def decode_time(milliseconds):
    """Converts a time in milliseconds into a string with hours:minutes,"""
    mins = int(milliseconds / (1000 * 60) % 60)
    hrs = int(milliseconds / (1000 * 60 * 60) % 24)
    return "{h:0>2}:{m:0>2}".format(h=hrs, m=mins)