well, i am a jew, i like the high holy days, and i don't question the existence of a higher power -- i actively disbelief in the existence of a higher power, all questioning over.

so what i do is i go and i read the quotations in the front of our prayer books, which are very interesting and have surprisingly little to do with any deities for the most part, and i listen to the humanist aspects of the sermon and i take the god bit as metaphorical and don't sweat it. and yeah, as @lazylee said, enjoy the food. our break-the-fast is heavy on the lox. i adore lox. lox is good. every time someone says "god" i could think of lox and smile (i don't need to do that but if it was a problem, you know?)

now, nonjews reading this might not quite get it, but there is no fire and brimstone in judaism, and the sermons i remember best from my extremely infrequent visits were about recycling and whether or not there was an afterlife (rabbi's conclusion: we don't know, but it's interesting to think about, albeit not an important part of living. no christian would say THAT!) and yom kippur is interesting in and of itself because it reminds us 1. to offer forgiveness if possible to those who have harmed us, 2. to ask forgiveness of those we have harmed, not of god, but of those humans we have harmed, and that it's not all that important to us whether or not they do forgive us, but it is important to be sincere in the asking and to change or have changed the harmful behavior; and 3. remember what it feels like to be hungry because there are still hungry (and enslaved) people in the world today. those are good concepts and you don't need a god to want to remember those things.

g

Go out for Chinese?

Ignore them, just like "god" ignored everyone during the Holocaust.

The existence of imaginary beings should always be questioned.
Then dismissed as nothing more than the myths they all are.
ALL gods are myths.

A higher power? I like 220 volts over 120?

Simple, just grab a nice freshly made Ham sandwich ( after all the Kosher rules are RELIGION based anyway) or two and have a relaxing time with a picnic or sitting by seashore.

I dunno, feel guilty about something you shouldn't? That seems to be the whole point of religion anyways.

Eat Chinese food and go to the movies.

Who is they? Why would "they" question the existence of something that doesn't exist? This sounds like an oxymoron to me. But, regardless, here at least nobody believes in high or even low holy days, we only believe in normal run of the mill common days comprised of 24 hours and we choose to do whatever we want to do during those days as it's nobody's business what you choose to do any given day (as long as it is legal). So do whatever you want to do.

Go enjoy a nice chocolate milkshake!

Just do what you do on all the other days, and stop questioning. Just enjoy.

Become a secular Jew

I don't question a higher power. I just let Him do His thing while i do mine. One thing i know...these religion cats have no inkling as to What He is or what He is doing. Those of us here, on this site, are actually more in tune with Him than they could ever be. We're minding our own business and tending to living, each is our own way. No falsehoods attributed to That Which Is (or Isn't). However, the Jews had it right when they said it was a sin to even mention His name. Also, "Do not take the name of the L.... in vain." Jews, again. Right? So on the High Holy days feel good about yourself. You're so much closer to the truth than they.

I was raised Jewish, so I just enjoy the cultural aspect and have a nice dinner with my family/loved ones. There was always a running joke in my family that every celebration was an excuse to eat.

Spend it with your family. Ignore the god part. Eat the food!

A-Jew-duh-cate it?...
Yeah I went there sue me...

This seems like a strange place to ask

Start like everybody else... start with the lower power!!!

Drink booze like anybody else?

How about having a few days off?

Ignore tha questions. Of course, you can always speak as a historian not a believer. When believrs start bothering me, I start telling them about Odin,Allvattar, the Norse god, who hung himself upside downfrom Yggdrasil ( the world tree) plucked out one of his eyes to gain the knowlege of certain runes. These are all Heldensagen, heroes tales, and people crave them . Have some ready to tell. It doesn't matter which religion you choose. They are all tales.

I think we all could benefit from a day of honest atonement as in Yom Kippur. Rosh Hashanah looks like it could be a fun time.

The culture I come from is Jewish, but I am 3rd generation atheist on one side, maybe both. What are called the High Holy days, and, in spring Passover, are an annoyance to me . Well, no, just Passover is, with its food restrictions. As a teenager, a friend and I wanted to see what it was all about, and tried to attend "Services." We were simply turned away at the door, having no tickets, and the apparent disregard for us, rather than some interest in why we might have come without tickets, did nothing to endear either of us to the religion.
I do nothing different at the autumn holy days, and have attended a Seder at Passover, at a cousin's annually. To me, this is just a time to visit with family. My wife has done second night Seder at our house, but, now, with no family close by, after our recent move, we'll see.

Take the question seriously, and seek an answer by the scientific method. Look for facts and evidence, not just blind faith.

Enjoy the food.

Volunteer for a non-religious charity. Show love to your fellow humans, and do something that is meaningful to you.