Dior goes to Doriath
Event Type: Political
Age: 1st Age
"Now Dior Thingol's heir bade farewell to Beren and Lúthien, and departing from Lanthir Lamath with Nimloth his wife he came to Menegroth, and abode there; and with them went their young sons Eluréd and Elurín, and Elwing their daughter. Then the Sindar received them with joy, and they arose from the darkness of their grief for fallen kin and King and for the departure of Melian; and Dior Eluchíl set himself to raise anew the glory of the kingdom of Doriath."
The Silarillion, Ch 22, Of the Ruin of Doriath
Three different years are given for this event. In the Lost Road, The Later Annals of Beleriand, the date is given as 502. In The War of the Jewels, both in The Grey Annals as well as The Tale of Years the year is 503.