Last 12 years has been a period of having three same numbers as part of calendar, which will next be seen in the coming century.
01.01.01
02.02.02
03.03.03
04.04.04
05.05.05
06.06.06
07.07.07
08.08.08
09.09.09
10.10.10
11.11.11
12.12.12