import time


def check_timestamp(timeStamp):
    """ Checks the validity of a timeStamp.

        timeStamp - (YYYY-MM-DD HH:MM:SS in UTC)

        returns True or False
    """
    isValid = True

    try:
        timeStruct = time.strptime(timeStamp, "%Y-%m-%d %H:%M:%S")
    except:
        isValid = False

    return isValid