Add more eras

[joeroe]

• Common Era
  • BC/AD
  • BCE/CE
  • Translations
• Islamic/Hijra calendars
  • Arabic Lunar Hijri
  • Modern Iranian Solar Hijri
  • Jilali Solar Hijri
• Indian/Hindu calendars
  • Shaka era
• Modern Hebrew calendar
• Buddhist calendars
• Zoroastrian calendars https://zanc.org/zcal/zcal.html
  • Shenshai calendar
  • Fasli calendar
  • Kadmi calendar
• Chinese calendars
• Maya calendars
• Other contemporary calendars
  • Juche calendar
• Historic European calendars
  • Julian Common Era calendar
  • French Republican calendar
  • Era Fascista
• Historic Jewish calendars
• Ancient Egyptian calendars
• Ancient Greek calendars
• Ancient Roman calendars
  • AUC
  • Regnal eras
• Other historic calendars

Many are dependent on #15.

General resources:

• https://calendars.wikia.org/wiki/Main_Page
• https://c14.arch.ox.ac.uk/oxcalhelp/hlp_analysis_inform.html
• https://en.wikipedia.org/wiki/Year
• https://en.wikipedia.org/wiki/List_of_calendars