I don’t go by the ‘62 calendar, but thanks for the explanation.
Wednesday would not be an Ember Day on the pre-1955 calendar either:
According to the ranking of feasts, the pre-1955 calendar designates the Feast of St. Matthew as a "double of the second class."
The rule regarding doubles of the second class was, "They are never omitted, but are transferred to the first available day if impeded by a Double of the First Class, or by a
privileged Sunday or
Feria (ie. Advent Sunday, Sundays in Lent, Ash Wednesday, or days in Holy Week)."
https://breviary.net/rankings.htm However, since according to the same ranking system an Ember Day was considered only a
non-privileged ferial, it is superceded in the Ordo by the superior feast.
https://en.wikipedia.org/wiki/General_Roman_Calendar_of_1954 It is for this reason that Mark79's sedevacantist chapel rightly omits to consider Wednesday an Ember Day this year, while the Traditio.com calendar is in error for doing so.