Questions about the General Roman Calendar

[Tis_Bearself]

I have been trying to read about the history of the General Roman Calendar and I’m getting pretty confused.
Can someone who’s knowledgeable about the Calendar help me with these questions?

1. Pope Pius V created the Tridentine Calendar. Is there any record of what the Calendar looked like before he changed it, and what was that Calendar (the pre-Tridentine one) called?
2. Is it correct that the Tridentine Calendar, with the addition over the years of a number of feasts and saints’ days, stayed in use until Pope Pius X revised it in 1907?
3. Is it then the case that the Pope Pius X calendar, with the addition of some feasts and saints’ days, stayed in use until Pope Pius XII changed it around again in 1955, after which it was changed again in 1960 and 1969?
4. Weren’t people kind of ticked off about having to buy a new missal in 1955, then another new missal in 1960 just five years later? (My memory is that by 1969 nobody under senior citizen age was bothering with a missal.)
5. I understand the “Tridentine Calendar” is still authorized for use based on Summorum Pontificorum. However, which year’s version of the “Tridentine Calendar” is actually used?
6. Did revising the calendar 3 times between 1955 and 1969 actually accomplish anything other than just confusing people?

 

[Vico]

I have been trying to read about the history of the General Roman Calendar and I’m getting pretty confused.
Can someone who’s knowledgeable about the Calendar help me with these questions?

1. Pope Pius V created the Tridentine Calendar. Is there any record of what the Calendar looked like before he changed it, and what was that Calendar (the pre-Tridentine one) called?
2. Is it correct that the Tridentine Calendar, with the addition over the years of a number of feasts and saints’ days, stayed in use until Pope Pius X revised it in 1907?
3. Is it then the case that the Pope Pius X calendar, with the addition of some feasts and saints’ days, stayed in use until Pope Pius XII changed it around again in 1955, after which it was changed again in 1960 and 1969?
4. Weren’t people kind of ticked off about having to buy a new missal in 1955, then another new missal in 1960 just five years later? (My memory is that by 1969 nobody under senior citizen age was bothering with a missal.)
5. I understand the “Tridentine Calendar” is still authorized for use based on Summorum Pontificorum. However, which year’s version of the “Tridentine Calendar” is actually used?
6. Did revising the calendar 3 times between 1955 and 1969 actually accomplish anything other than just confusing people?

Pre Tridentine: considerable divergence prevailed among the calendars in use at the close of the Middle Ages. The earliest calender example is from St. Willibrord A.D. 695.

Thurston, H. (1908). Christian Calendar. In The Catholic Encyclopedia. New York: Robert Appleton Company. http://www.newadvent.org/cathen/03158a.htm

St. Pope Pius V Tridentine Calendar reform. Added Our Lady of Victory and removed Presentation of the Virgin Mary.
Pope Sixtus V restored Presentation of the Virgin Mary.
St. Pope Pius X made a general calendar reform.
Pope Pius XI added the Feast of Christ the King in 1925.
Ven. Pope Pius XII added Feasts of Pius X and Queenship of Mary in 1954.
Ven. Pope Pius XII Holy Week Revisions of 1955.
St. Pope John XXIII revised the calendar in 1960, used in the General Calendar 1962.
Bl. Pope Paul VI revised the calendar in 1969. Simplified ranking.
Recent addition of Vigil of the Epiphany and a Vigil of the Ascension.

General Roman Calendar 1960 is used in the 1962 Roman Missal (used for E.F. per Pope Benedict XVI - 2007)

 

[BartholomewB]

1. Did revising the calendar 3 times between 1955 and 1969 actually accomplish anything other than just confusing people?

It seems only natural that the Calendar will need to be modified from time to time, but it would be better not to do it too often. Say a minimum sixty-year pause between one revision and the next one, so that no one will have to go through more than one revision in their adult liftetime.

 

[Tis_Bearself]

I can see small changes such as adding a new saint or even a new Marian feast like Pope Francis just did.
But it seems like the changes over the time period I mention were more extensive than that.