Those who sign up at adventchallenge.org.uk will be sent three challenges each day and asked to pick one.
The charity said the challenges are simple, practical and Bible-based. It includes donating to your local foodbank, leaving a Christmas card out for the refuse collector, or just giving someone a smile.
This the fourth time the charity has held the challenge. Last year more than 100,000 challenges were accepted online.
Someone who participated last year said: "I hand delivered a Christmas card to a neighbour two-doors down.
"I have lived in my house for 15 years and have barely spoken to them. I had a card straight back. We now talk."
The daily Bible verses sent with the challenges follow the journey Mary and Joseph made to Bethlehem where Jesus was born.
Another person said: "I loved it... being able to think about how you can do things for others so it became a habit.
"Some of the passages were also very challenging personally and one of them along with the challenge helped me be free from some feelings that I had been harbouring and it felt so good."
Richard Franklin from Bible Society said: "We hope that as many people as possible will sign up to #AdventChallenge and do some really simple and practical things to spread some love, peace and joy this Christmas."
To cater to families with children, each day there is a craft activity for building a nativity scene.
