[quote="EphelDuath, post:17, topic:338494"]
Not quite. According to the universal norms of the Roman Calendar, any solemnity that falls on a Sunday is not suppressed if it is during Ordinary Time. This includes All Saints, the Assumption, Sts. Peter & Paul, the Birth of St. John the Baptist, and St. Joseph Husband of the Virgin.
So it would be in no way unprecedented if the Birth of Mary be turned into a solemnity and celebrated on Sunday.
Interestingly, the notion that general Sundays "outrank" any high-class feasts that might fall on a Sunday is a notion that came about in the 20th century, when Pope St. Pius X reformed the Breviary. And that was for purely practical reasons, since the saints' commons in the Breviary were considered too repetitive, and disrupted the traditional Benedictine notion of praying the whole Psalter in one week. So Pius X fiddled with the rubrics so that Sundays would usually be celebrated with the ferial Psalms.
For the majority of the history of the Church, this was not the case. There is really nothing wrong with celebrating a saint's feast day on Sunday; it is not as if the other six days of the week didn't already belong to Our Lord.
The Annunciation has traditionally been considered a feast of Our Lord, with the Virgin and the Archangel Gabriel being participants.
Considering the role that the Blessed Virgin played, and still plays, in our salvation, I see no good reason why the Nativity of the Virgin and the Crowning in Heaven of the Virgin cannot also be solemnities.
I plan on looking more into Pope St. Pius the X. Have heard him mentioned on other threads, also. Very interesting.
Sunday is The Lord's Day, the only day named holy by God.
(I know the seventh day was Saturday, but the Apostles celebrated Sundays, as do I.)