Question: What are some existing calendars ?
Answers:
answer_text: Vikram samwat
answer_text: Roman calendar
answer_text: Attic calendar
answer_text: Seleucid calendar
answer_text: Julian calendar
answer_text: Coptic calendar
answer_text: Berber calendar
answer_text: Gaulish calendar
answer_text: Zoroastrian calendar
answer_text: Japanese calendar
answer_text: Islamic calendar
answer_text: Pyu calendar
answer_text: Byzantine calendar
answer_text: Armenian calendar
answer_text: Florentine calendar
answer_text: Pisan calendar
answer_text: Tamil calendar
answer_text: Nepali calendar
answer_text: Thai lunar calendar
answer_text: Jalali calendar
answer_text: Hebrew calendar
answer_text: Tibetan calendar
answer_text: Runic calendar
answer_text: Gregorian calendar
answer_text: Javanese calendar
answer_text: Swedish calendar
answer_text: Rumi calendar
answer_text: Thai solar calendar
answer_text: Revised Julian calendar
answer_text: Solar Hijri calendar
answer_text: Soviet calendar
answer_text: World Calendar
answer_text: Indian national calendar
answer_text: Holocene calendar
answer_text: Juche era calendar
answer_text: Nanakshahi calendar
answer_text: Symmetry454
answer_text: Igbo calendar