Not only is this about the High Holy Day itself, but Rosh haShanah determines the dates of all the other holy days, holidays, and fast days. There will also be tidbits about other days in the Jewish calendar, including stories of how the word got out about new months before there was a permanent calendar, and why the names of our months are not Hebrew, but Babylonian. No familiarity with Talmud or Hebrew is required, and all your questions are welcome!