On the following Mondays the Mystery sites record their sunrise/sunset data. We collect the data and link to it here on Fridays, four days later.

• Data from Jan 31 (reported Feb 4)
• Data from Feb 7 (reported Feb 11)
• Data from Feb 14 (reported Feb 18)
• Data from Feb 21 (reported Feb 25)
• Data from Feb 28 (reported Mar 4)
• Data from Mar 7 (reported Mar 11)
• Data from Mar 14 (reported Mar 18)
• Data from Mar 21 (reported Mar 25)
• Data from Mar 28 (reported Apr 1)
• Data from Apr 4 (reported Apr 8)
• Data from Apr 11 (reported Apr 15)

• Read March 18, 2011 Update to find Longitude Clues and related resources.

• Sunrise/Sunset Lookup
• Datasheet and Graph
• Calendar
• Latest News

Beginning in March, interdisciplinary clues— about the climate, geography, history and other facts—are posted here on the Fridays.

• March 25
• April 1
• April 8
• April 15

• Clues from Mystery Class #1
• Clues from Mystery Class #2
• Clues from Mystery Class #3
• Clues from Mystery Class #4
• Clues from Mystery Class #5
• Clues from Mystery Class #6
• Clues from Mystery Class #7
• Clues from Mystery Class #8
• Clues from Mystery Class #9
• Clues from Mystery Class #10