Differenze tra le versioni di "Anno 0"

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== Collegamenti esterni ==
* {{en}} [https://web.archive.org/web/20040401234715/http://astro.nmsu.edu/~lhuber/leaphist.html Calendars and their History] - L. E. Doggett
* {{en}} {{collegamento interrotto|1=[http://www.rog.nmm.ac.uk/leaflets/new_mill.html The New Millennium] {{Webarchive|dateurl=aprile 2018https://web.archive.org/web/20021004062819/http://www.rog.nmm.ac.uk/leaflets/new_mill.html |botdate=InternetArchiveBot4 ottobre 2002 }} - Royal Greenwich Observatory
* {{en}} [https://web.archive.org/web/20010305143920/http://aa.usno.navy.mil/aa/faq/docs/millennium.html Millennium] - US Naval Observatory
* {{en}} [https://www.timeanddate.com/counters/mil2000.html Difference Between Millennium and 2000] - Time and Date.com
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