Your sync window is 30 days, 1 year or unlimited depending on plan. Why a healthy sync can still look incomplete, and what repeating events do instead.
30 days on Free, 1 year on Plus, unlimited on Pro. Anything starting beyond that window doesn't get copied yet.
The control is How far ahead to sync, in the sync's settings.
Nothing is lost — the event isn't deleted, just not copied yet. Don't count on it copying itself in as the date gets closer, though: whether that happens depends on your calendar provider, and on some it doesn't. If something's missing, open the sync's menu and choose Re-sync — that's the reliable way to bring in anything that's now inside your window.
This is the usual reason an otherwise healthy sync looks like it's missing things. Your March events copied, your July events didn't, and it looks broken. It isn't — July is outside the window.
Quickest check: find an event that didn't copy and look at its start date. Count the days. If it's past your plan's window, that's your answer.
How far ahead to sync is about the future. Past events are a separate setting, Copy past events, and it only applies when the sync first runs: None, Past week, or Past month. The default is None, so a new sync copies from today onward and leaves your history alone.
If you needed history and picked None, changing the setting later doesn't reach back and fetch it. Nor can you go back further than a month — a full-history backfill isn't something you can request.
A weekly standup copies as a whole series, including occurrences years out, no matter what your window says. Recurring events transfer as one repeating event rather than as hundreds of separate copies, so the window has nothing to apply to.
Two consequences worth knowing. A Free plan with a 30-day window can still have repeating events showing up 5 years out, which surprises people. And an event that used to repeat and got changed to a one-off suddenly becomes subject to the window like anything else.
Change the setting on the sync — an upgrade widens what you're allowed to pick, but it doesn't move an existing sync's window for you. Set it to the wider option, then open the sync's menu and choose Re-sync. The catch-up isn't instant; a year of events is a lot to write, and calendar providers rate-limit how fast anyone can write to them. Give it a few runs.
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