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These are yearly calendars for Lick and Keck Observatories at each date:
- sunrise/sunset
- moonrise/moonset
- sidereal times (at twilight, midnight, dawn)
- length of night (whole night, dark hours, % dark)
Data at each observatory given for:
- 1998 - 2020 nautical (12 deg)
- 1998 - 2020 astronomical (18 deg)
Calendars compiled by Dr. Arnold Klemola. Contact webeditor@ucolick.org if you cannot access these calendars.