When viewing the month grid, the only indicator that a day is in the past is the absence of the “current‑day” blue circle and any past even that is slightly greyed out. All past days share the same background grid color as future days, so it takes a quick visual scan to locate today’s date and to distinguish past dates from upcoming ones.

Would be nice to add a subtle background shading (e.g., a light gray overlay) to every day‑cell whose date is earlier than the current and future days. This would make past days instantly recognizable at a glance, reduce the cognitive load when locating today’s date and keep the UI clean—use a low‑contrast shade so existing event colors remain readable.

Maybe this could be added under the Appareance setting, as every use may have a different preference, so they can select how past-days grid background should look, etc.