The first season of the Elves' year, immediately following yestarë, the first day of the year, which did not belong to any season. Tuilë covered a period of fifty-four days, between modern 29 March and 21 May. Tuilë was the Quenya name for this season; the Sindar called it Ethuil; both names derived from an ancient Elvish element tuy- meaning 'to spring or sprout'. From the same origin came the Quenya word tuilindo, literally 'spring-singer' (known in English as the swallow) which returned to the northern lands during the season of tuilë.