échéance

expiry date, expiration date; due date, redemption date, date of payment; term (period of time)

“arriver à échéance” — to fall due

From past participle of échoir + -ance, possibly, but less likely, corresponding to a Late Latin or Vulgar Latin *excadentia, from *excadens from *excadere, from Latin cadere (“fall”). Compare Italian scadenza.