For the contests, WA7BNM has a nice graphical calendar showing start/end times of each contest each week. It is far and away my go-to reference for contest activities. e.g. http://www.hornucopia.com/contestcal/weeklycont.php
Of course DX-peditions do not always run like clockwork but... is there a similar graphical calendar for DXpeditions (at least planned dates)? I know there are tabular listings in QST and many online sources, maybe I should just synthesize a graphical calendar from those.
A similar step might be something to coordinate with Google or Outlook calendars.