Running a history or 'On This Day' account gives you a built-in editorial calendar. Every date holds hundreds of anniversaries, discoveries and turning points.

The catch is that the calendar resets every 365 days.

After your first year, you hit the wall. October 6th comes round again, and you're either digging through last year's posts to see what you already covered, or you're posting the same fact again and hoping nobody notices.

Why repeats hurt history accounts

People follow history accounts to discover things. They notice when the same event turns up on the same date every year, and the account starts to feel like it's running on autopilot.

Most schedulers can't help with this. They treat each post as a separate block of text, so they have no idea that today's post covers the same event as one you published a year ago. Avoiding repeats is left to your memory or a spreadsheet.

Ask a different question

When a date comes round again, don't ask "What happened today?" Ask "What happened today that I haven't posted about yet?"

Take July 16th:

One year, cover the launch of Apollo 11 in 1969.

The next year, cover the first atomic bomb test at Trinity in 1945.

The year after, go back to 622, the start of the Islamic calendar.

It's the same date with a completely different story each time. The hard part is remembering which ones you've already used, and that's the job SmartTagAI takes off your hands.

How SmartTagAI keeps your feed fresh

SmartTagAI writes your posts with AI and remembers which years and events it has already used for each tag. When it writes the next post for a date, it picks an event you haven't covered, so you never have to cross-check your archive.

Here's the whole workflow:

1. Create a tag such as #onthisday or #WorldHistory, and describe the style you want: tone, length, hashtags.

2. Let the AI write. SmartTagAI drafts a post for the date and steers clear of years and events the tag has already used.

3. Review it. Edit the text, add an image, or ask for another version.

4. Schedule it. Send it to Bluesky directly, or to X through your own Buffer account. Put it in your first posting slot of the day, so your anniversary post goes out early.

5. Let it loop (Pro). On the Pro plan, SmartTagAI can create up to 5 posts for a tag automatically, so the rest of your week is filled while you get on with other things.

That's how History Chrono runs its daily posts: one tag, a fresh event every day, and no spreadsheet.

A quick check before every anniversary post

Even with the AI handling repeats, run through these four questions:

1. Is there a better source? A letter, an audio clip or an archive photo makes a familiar event feel new.

2. Zoom in or out? If the big picture has been done, focus on one person's experience of that day.

3. Are the facts right? Popular history "facts" get debunked all the time, so check before you post.

4. Does it fit your voice? Edit the draft until it sounds like your account.

Keep it fresh without the busywork

You don't need an endless list of obscure events. You need a tool that remembers what you've already posted, so you can spend your time on the stories rather than the bookkeeping.