Round time intervals in other bases

2000 years is a nice round number. But if we write it in base 2 we get 11111010000 which is not so nice. In binary the next nice number will be 100000000000, which is 2^11 = 2048 in base ten years. So we are only 50 or so years away from another big party, especially if everyone switches to base 2. Checking the next "nice" number for each base system yields some nice ones coming up. (base 3, base 4, .. base 11, base 12, ...

This gives several "party opportunities" for the next century what are they? Answer