No, there is no requirement. Some Orthodox ppl choose to dress differently then others. For example: the girls wear only skirts, or the boys wear a nice shirt and pants. But, there is rely no requirement.
Fine clothing is worn on Sabbath and holy-days.
Anything modest and formal
Yes! They have to wear white clothes.
As per the norms people usually wear new clothes on Diwali.
They wear clothes , and there underwear has skid marks , and yeaaaa
clothes.
Spanish clothes
Modest ones. Men wear kippahs, talleisim, and tfillin.
yes. Special clothes are worn on this day. People wear ethnic dresses
Clothes Clothes
No you don't have to wear special clothes on a pilgrimage
There are no formal birthday clothes in English traditions.
Clothes for summer! There's no "special Polish clothes" for summertime.
People in the United States do not wear special clothes for Christmas. Some might dress up a bit, but most wear clothes they would wear any other day.