when did the early church celebrate the lord's day
Lord's Day In the first centuries, Sunday, being made a festival in honor of Christ's resurrection, received attention as a day of religious services and recreation, but seventh-day Sabbath rest (based on the Jewish Shabbat, because the earliest Christians were all Jews) was still observed by "almost all churches".[10][11] Often first-day worship (Sunday morning or Saturday night) was practiced alongside observance of seventh-day Sabbath rest[15] and was a widespread Christian tradition by the 2nd century, attested in patristic writings of the 2nd century;[16][17] over time, Sunday thus came to be known as Lord's Day. These early Christians believed that the resurrection and ascension of Christ signals the renewal of creation, making the day on which God accomplished it a day analogous to the first day of creation when God made the light. Some of these writers referred to Sunday as the "eighth day".
The Day of the Lord In the New Testament, the "day of the Lord" may also refer to the writer's own times, or it may refer to predicted events in a later age of earth's history including the final judgment[1] and the World to Come. The expression may also have an extended meaning in referring to both the first and second comings of Jesus Christ.