09.04.24: more on ordinal numbers; 11th – 31st

Image: ordinal numbers from 11th – 31st

Where the ordinal comprises two parts e.g. septimus decimus, both parts will decline: septimō decimō

From the 1631 text:

decimō quīntō: on the fifteenth (day)

decimō octāvō: on the eighteenth (day)

vīgēsimō tertiō: on the twenty-third (day)

Note again the use of the ablative to express a specific point in time: decimō quīntō; on the fifteenth (day)