The earliest document of the blessing of oils seems while in the Apostolic Tradition, an early Christian document normally acknowledged for being dated ahead of 235 CE. Today, consecrating the oils is carefully tied to preparing for Holy Saturday’s Easter Vigil, as hundreds are baptized into the Catholic Church https://liantong.com.tw/%e6%83%b3%e8%be%a6%e7%90%86%e6%96%b0%e7%ab%b9%e6%88%bf%e5%b1%8b%e4%ba%8c%e8%83%8e%e8%b2%b8%e6%ac%be%ef%bc%9f%e8%81%af%e9%80%9a%e8%b2%b8%e6%95%99%e6%82%a8%e5%a6%82%e4%bd%95%e7%b0%a1%e5%96%ae%e7%94%b3/