From CGI's FrancisDrake:

I've mentioned this earthquake cycle before here (three times 260 days ago to be exact), but the archives are lost, so I need to recapitulate here:

1. This earthquake was 602,420 days ago tonight, at sunrise local time which is about midnight Central USA time...
http://en.wikipedia.org/wiki/365_Crete_earthquake
That figure of 602,420 days is 331 times 7 times 260 days, or 1655 times 364 days (1655 "perfect" years ago).

2. This earthquake was 18,200 days ago tonight, at the stroke of midnight Eastern USA time zone...
http://en.wikipedia.org/wiki/1965_Rat_Islands_earthquake
That figure of 18,200 days is 10 times 7 times 260 days or 50 times 364 days (50 "perfect" years ago)

3. This earthquake was 7,2880 days ago tonight/tomorrow morning (at 4:19 AM California Time), or 20 "perfect" years ago...
http://earthquake.usgs.gov/earthquakes/eqarchives/significant/sig_1994.php

28 December 1994
28 12:19:23.6 40.451 143.491 33 N 6.4 7.5 1.0 298 OFF EAST COAST OF HONSHU, JAPAN. Mw 7.7 Two people were killed, more than 200 injured and damage in the Hachinohe area. Felt at Aomori, Morioka and Mutsu; at Miyako and Ofunato; at Sendai. Also felt at Hakodate, Obihiro, Tomakomai and Urakawa; at Sapporo, Hokkaido. Felt as far away as Tokyo. Local tsunami generated with maximum wave heights (peak-to-trough) recorded at the following selected tide stations: 110 cm. at Miyako, 88 cm. at Hachinohe, 54 cm. atOfunato, 10 cm. at Choshi, Honshu; 48 cm. at Urakawa, 36 cm. at Hakodate and Kushiro, Hokkaido.

4. It is worth noghting that exactly 10 x 365 days after that third earthquake listed above (off coast of Eastern Japan) is when this earthquake happened...

http://en.wikipedia.org/wiki/2004_Indian_Ocean_earthquake_and_tsunami