Wiktionary
twenty-one hundred
card. 1 The start of the twenty-second hour of the day on the 24-hour clock i.e. 21:00. 2 The number two thousand one hundred. 3 The year 2100.
Usage examples of "twenty-one hundred".
We'll meet in the courtyard outside the hostel at, oh, twenty-one hundred hours.
Pal of mine at the Ventura courthouse said he logged twenty-one hundred sixty-six beans of the ransom money into the evidence locker.