loveday
/ˈlʌvdeɪ/noun
1A day appointed for a meeting with a view to the amicable settlement of a dispute; a meeting held for this reason; (formerly also) †an agreement entered into at such a meeting (obsolete ). Now historical.
2Chiefly poetic. A day devoted to love; a day of love.
Origin
Middle English; earliest use found in St. Edmund Rich. From love + day. Although attested slightly earlier, post-classical Latin dies amoris and Anglo-Norman jour d'amour are probably modelled on the English expression.