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Dark Sky Observing Time Tables

To find at your observing location the times for sunrise, sunset, moonrise, moonset, and twilight use the U.S. Naval Observatory Data Services, Natonal Weather Service - Portland Office Local Solar and Lunar Data, or if you observer in the Portland, Oregon, U.S.A. use the below dark sky tables. The below dark sky tables determine the the total Moon-free, twilight-free viewing time for each night of the year. Moon-free, twilight-free viewing time is the best time to observer deep sky objects because the moon light and twilight will not interfere with observing these faint objects.

The dark sky table shows the times for sunset, astronomical twilight ends, astronomical twilight starts, sunrise, moonrise, moonset and total moon-free, twilight-free viewing time for Portland, Oregon, U.S.A. (Longitude: West 122.68 degrees & Latitude: North 45.52 degrees).

2017
PST
PDT

2016
PST
PDT

2015
PST
PDT

2014
PST
PDT

2013
PST
PDT

2012
2012.txt
January
February
March
April
May
June
July
August
September
October
November
December

2011
2011.txt
January
February
March
April
May
June
July
August
September
October
November
December

2010
2010.txt
January
February
March
April
May
June
July
August
September
October
November
December

2009
2009.txt
January
February
March
April
May
June
July
August
September
October
November
December

2008
2008.txt
January
February
March
April
May
June
July
August
September
October
November
December

2007
January
February
March
April
May
June
July
August
September
October
November
December

2006
January
February
March
April
May
June
July
August
September
October
November
December

2005
January
February
March
April
May
June
July
August
September
October
November
December

2004
January
February
March
April
May
June
July
August
September
October
November
December

2003
January
February
March
April
May
June
July
August
September
October
November
December

2002
January
February
March
April
May
June
July
August
September
October
November
December

2001
January
February
March
April
May
June
July
August
September
October
November
December

2000
January
February
March
April
May
June
July
August
September
October
November
December

1999
January
February
March
April
May
June
July
August
September
October
November
December

1998
November
December

These Dark Sky tables may print better in landscape orientation. Also, when printing using Netscape check the Black Text option in the File menu, Page Setup... menu in order to print the white text. These Dark Sky tables were created by Dave Heider's Dark Sky DOS program. Download the Dark Sky DOS program to create your own unique Dark Sky tables for your observing location and time.

Welcome to Sunrise Sunset Free Printable Calendars