Hello Helen, your sentence is correct! Are you referring to the calendar that has chocolate inside? We buy those every year for my children. It is called an Advent Calendar, but I would clarify something: The calendars always start December 1st. The true start date of Advent varies from year to year according to a formula. The chocolate calendars> https://www.amazon.com/dp/B006ZLKDL4/ref=asc_df_B006ZLKDL45294243/?tag=hyprod-20&creative=395009&creativeASIN=B006ZLKDL4&linkCode=df0&hvadid=191991579757&hvpos=1o2&hvnetw=g&hvrand=1591667109439978326&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9026904&hvtargid=pla-301581931842 True starting date of Advent https://www.timeanddate.com/holidays/us/first-sunday-advent