to my understanding is that it is something like why do guys wear suits and their good ties and girls wear their nice outfits? to be in the spirit of Shabbos and stuff like that. for example, when you go to shul on Shabbos morning, would you wear the jeans, t-shirt and running shoes that you would wear to school? Probably not. same thing
Why not? You’re not allowed to wear them on Yom Kippur (and I’m not sure about other holidays) because they feel good.
for the record, it’s yom kippur(because of the pasuk v’inisem es nafshoseychem) and tisha b’av(b/c of aveilus)...but even then it’s permitted to wear leather shoes outside (to protect the feet), but not for comfort...that’s why they aren’t muktzah on yom kippur.
yeah the whole point of not wearing leather shoes on tishabeav and yom kippur is because it is a sign of mourning. According to some opinions it is also forbidden to wear comfortable shoes even if they aren’t leather because of the same reason. As well fake leather shoes are forbidden by some opinions because it could be considered marit ayin which is basically you’re not supposed to look like you’re doing something wrong even if you’re doing it right.
for shabbat we sort of have an extra mitzvah to prepare in honour for shabbat so we shower and get dressed up in honour of shabbat. We are supposed to keep the most beautiful things for shabbat to help us feel the festivity of the day of rest
y’’k has nothing to do with mourning! it’s based on the pasuk (see above)...yom kippur and tisha b’av are(currently) very different days...yom kippur is an extremely happy day, while tisha b’av is a sad one. we mourn the churban...not getting mechila!
Tisha B’Av is about mourning. Yom Kippur is about depriving ourselves of certain pleasures as part of the teshuvah process. In either case, we don’t wear leather shoes. As to the original question, I don’t know anyone who specifically goes out of their way to wear leather shoes on Shabbos or Yom Tov, just to wear nice clothes. If anyone does, I imagine that it’s the flip side of not wearing them on Yom Kippur and 9 Av!
well we do these mourning things (on yom kippur) as a means of self infliction to show we really want mechila and put us in the right mood for the davening and day