What does the word shainee mean? Thank you

Are jewish people healthy?

We recently read in Parshat Kedoshim, the isur os "Lo Teonnu". Rashi says this means that one may not believe in "lucky seasons". He give an example that it is forbidden to state "this is a good day to go on a journey, or this is a bad day to do something".... If this is a clear cut Avera, why is it so acceptable in the Orthodax community to plan events such as weddings on Tuesday, because Tueasday is a "lucky day". There is also a tradition not to swim or do major business transactions during the the three weeks from 17 of Tamuz till Tisha Bav, because these are "unlucky times" for the Jewish People. It seems that these customs are in direct contradiction to a clear cut Isur Dorayta/ Please explain to me this obvius contradiction. Thank you

Can one use a whip cream can on shabbos?

are jews a race