Ascension Day, known as Christi Himmelfahrt in Austria, is a public holiday observed 40 days after Easter Sunday. It commemorates Jesus Christ's ascension into heaven as recorded in the Bible. This Christian observance is a significant event in the liturgical calendar and is celebrated across the entirety of Austria, alongside many other nations around the globe.

The holiday is generally marked by special church services that include singing traditional hymns and sermons focusing on the theme of ascension. Some people also participate in processions symbolic of Jesus’ journey to the Mount of Olives, before he ascended to Heaven. Many Austrians use the day as an opportunity for outings, hikes, and day trips, as it falls in the spring when the weather is usually quite pleasant.

Despite being a religious holiday, Ascension Day in Austria also reflects elements of the country's rich cultural traditions. Often, rural regions host festivities featuring folk music, dancing, and traditional Austrian food. This demonstrates how the holiday serves not only as a religious observance but also a cultural event, an occasion for bonding, enjoyment and celebrating the spring season in the distinctive Austrian context.