PostEaseThe value is the planning lead time, not the dates themselves
A list of relevant dates for your audience (holidays, industry observances, seasonal moments) is useful mainly because it forces planning ahead, rather than a scramble to post something relevant on the day. The specific dates matter less than the habit of checking a calendar early enough to prepare.
Pick dates relevant to your specific audience
A generic list of every possible holiday and observance produces a calendar padded with dates that mean nothing to your audience. A shorter list of the moments that matter to the people you're trying to reach is more useful than covering every date that exists.
A seasonal post still needs a real point
A post that exists only because a date happens to be relevant, with nothing genuine to say about it, tends to read as an obligation rather than something worth someone's attention. The calendar is a planning tool for when to post, not a replacement for having something real to say when the date arrives.