Artikelen in encyclopedia / Articles in encyclopedias

Català
Cronologia Viquipèdia: l'enciclopèdia lliure https://ca.wikipedia.org/wiki/Cronologia

Dansk
Kronologi Wikipedia: den frie encyklopædi https://da.wikipedia.org/wiki/Kronologi

Deutsch
Chronologie Wikipedia: die freie Enzyklopädie https://de.wikipedia.org/wiki/Chronologie

English
Chronology Wikipedia: the Free Encyclopedia https://en.wikipedia.org/wiki/Chronology
Chronology Encyclopædia Britannica https://www.britannica.com/topic/chronology
Chronology Simple English Wikipedia https://simple.wikipedia.org/wiki/Chronology
J. Gerard (1840–1912), "Chronology, General", Catholic Encyclopedia, 3 (1913) https://en.wikisource.org/wiki/Catholic_Encyclopedia_(1913)/General_Chronology

Espagñol
Cronología Wikipedia: la enciclopedia libre https://es.wikipedia.org/wiki/Cronolog%C3%ADa

Français
Chronologie Wikipédia: l'encyclopédie libre https://fr.wikipedia.org/wiki/Chronologie

Frysk
Gronology Wikipedy: de frije ensyklopedy https://fy.wikipedia.org/wiki/Gronology

Italiano
Cronologia Wikipedia: l'enciclopedia libera https://it.wikipedia.org/wiki/Cronologia

Nederlands
Chronologie Wikipedia: de vrije encyclopedie https://nl.wikipedia.org/wiki/Chronologie

Norsk
Kronologi Wikipedia: den frie encyklopedi https://no.wikipedia.org/wiki/Kronologi

Português
Cronologia Wikipédia: a enciclopédie livre https://pt.wikipedia.org/wiki/Cronologia

Svenska
Tideräkning Wikipedia: den fria encyklopedin https://sv.wikipedia.org/wiki/Tider%C3%A4kning

Video’s English

2011 Warren
J.J. Warren, A Short History of the Modern Calendar, 2011 dec 29
https://youtu.be/kzprsR2SvrQ (video 3:54)