Is Sunday the New Sabbath?

Going to church on the first day of the week was not taught to the early church by the Apostles as the new weekly sabbath - rather, going to church on the first day of the week was for them a means of supporting each other's faith that Christ Himself (and their relationship with Him) was the real, once-for-all, unending, eternal sabbath Who fulfilled the symbolism of the temporary Old Testament seventh-day sabbath.