Also, it was once common for the elves of Mirkwood and Lorien to visit each other. Again Thranduil is mentioned in the Battle of the Last Alliance and Legolas is not (also, Legolas often shows a lack of familiarity with death, making it very unlikely he’s fought it any great battles before), so we can assume he wasn’t born in the Second Age either. Beyond this, he claims that the Noldor elves were a “strange people” to him, so we can assume that Legolas was born after the War of the Jewels. Thranduil, Legolas’s father, is mentioned in the First Age, though Legolas is not. Based on Legolas’s experience, comments, and personality, though, we can estimate when he was born: In the Appendices at the end of Return of the King is a fairly thorough timeline of the Second and Third Ages, but there is absolutely no mention of Legolas (birth or otherwise) before the Council of Elrond.