ìtàdógún noun /ì.tà.dó.ɡṹ/
ìtàdínlógún (alternative), ìtàdílógún (alternative)
Definitions
  1. seventeenth day, seventeen days from now
Etymology
ẹ̀tà (“three”) + dín (“subtracted from”) + ogún (“twenty”)
Component words
ẹ̀tàthree dínsubtracted from ogúntwenty
Source: Wiktionary, where this word is spelled “itadogun”. Reference: en-itadogun-yo-noun-k7s0MpAV