Sources
Sources stay connected to each guide.
Each observance guide can show the sources used to support its factual claims.
Preferred sources
Government publications, official organizers, UN agencies, professional bodies, universities, institutional archives, faith communities and documented creators are preferred. Search snippets and repeated claims from novelty calendars are not treated as sufficient evidence on their own.
When sources conflict
Conflicting dates are not resolved by majority vote across copied calendars. When reliable sources disagree, we leave the point unresolved until the difference can be explained.