There are multiple examples of being used for 8. There does not seem to be a linguistic explanation for this use, although it is one stroke shorter than . was used by officers of the XVIII Roman Legion to write their number. The notation appears prominently on the cenotaph of their senior centurion Marcus Caelius ( – AD 9). On the publicly displayed official Roman calendars known as Fasti, is used for the 18 days to the next Kalends, and for the 28 days in February. The latter can be seen on the sole extant pre-Julian calendar, the Fasti Antiates Maiores.