A time-space synesthete can point at October. The year might be a hoop with December near the chest, or a ribbon rising to the right; hours and decades can have layouts too. The maps are stable and specific, and many owners use them the way others use a wall calendar.
The form is a special case of spatial sequence synesthesia and among the most common forms overall. Some studies suggest better calendar memory in people who have it, which fits the general pattern of synesthetic maps doubling as mnemonic furniture.