1.)In todays modern world and with flexible working hours christians should be allowed to worship god on any day of the week.
2.)In the catholic faith some christians dont go to mass on a sunday because they go on a saturday evening.
3.)Many jobs require people to work on a sunday.It is better for that person to continue to provide for themselves and families than to leave their job because of religiouys beliefs.
4.)Shopping is a form of leisure for many people. Northern ireland trading hours do not interfere with the usual times of church services.