In France you always knew when it was Ramadan. The small storekeepers who observe the fast (it's recent that most of them do) get cranky and scold each other if one smokes or drinks.

We lived near a conservative (not Orthodox) synagogue and on Fridays and holy days we often saw handsomely dressed Jewish families walking through the neighborhood, the fathers in long black coats, the mothers in wigs, the little boys skipping down the sidewalks sometimes wearing baseball caps to disguise their yarmulkes.
Here in Los Angeles, quite a few of the private schools are closed for Rosh Hashanah and Yom Kippur.
Because of the Holocaust, many young Europeans have never met a Jew. I had a Hungarian au pair once who used to make anti-Semitic remarks. One of the three people who gave me a no doubt unjustified prejudice against the entire Hungarian race. (Before you criticize me for keeping her on, let me ask you if you have ever known what it was to be desperate for a babysitter? And she had to speak English and French.) Each time, I would sharply correct her and she would say she was sorry.
The last straw. I snapped, "Gabriela, have you ever even met a Jew?"
"Yes," she said. "Once I went out to dinner with a bunch of students in Budapest, and one of the people at the table was a Jew!"
Years later, I got a letter from Gabriela. She was obviously going to one of those twelve-step programs. She wrote me a long, psychotic ramble about all the times she had been angry with me and the children, including the time D accidentally handcuffed her and the firemen had to cut the handcuffs off with four-foot shears.
But she apologized about the Jews. She wrote, "I have become a Christian and I am sorry I said those things about the Jews. They are God's chosen people."
I didn't write back.
A few years ago a Spanish newspaper ran an ad against anti-Semitism. It featured pictures of Einstein, Mendelssohn, Freud, Jonas Salk, Elias Canetti, Marc Chagall, and Jesus. Underneath the caption said, "So you think you are better than these people?"