Women and girls from 37 states and seven countries are participating in "No Makeup November," which is coordinated by Rave Ministries, a Christian girls ministry associated with the Churches of Christ.
Although 1,000 people have registered at Rave's website, Daniel estimates that the number of women participating in the challenge is closer to 4,000.
"This campaign in no way is an anti-makeup campaign, because let it be known that it is not the makeup that we are battling," said Rave's website. "Instead, it is a culture that we are trying to fight. A culture that tells our young girls, mothers, and yes, even grandmothers that they are not close to being good enough."
No Makeup November follows in the footsteps of "Movember," when men grow mustaches during November to raise awareness and funds for men's health issues, and "No Shave November," which raises awareness and funds for cancer prevention.
Although No Makeup November is not about raising money for a cause like prostate cancer, Daniel said it's still an awareness-raising campaign.
"It's bringing awareness to true beauty and to taking off the mask," Daniel said. "I believe that there's a need because of the culture that we live in. It's just very much beauty-saturated: 'beauty' meaning what's on the outside."
Rave Ministries first coordinated the campaign a year ago after Lauren King, another team leader and Daniel's sister, saw videos made by Brooke Ferguson, a student at Lipscomb University. Ferguson had gone without makeup for 40 days during the summer of 2011 and made video blogs about the experience.
This November is the first year the campaign has really taken off, Daniel said.
Participants have built a community across the world as they encourage each other over Twitter, Facebook and Instagram using the hashtag #NMN. The team leaders at Rave have also posted regular devotionals and other words of encouragement to participants.
"There are some people who don't go out of their house without it on," Daniel said. "It has been difficult for some. Overall, I would say the most difficult place for girls and for women — for women especially — the place that is most difficult to go is church. And I found that ironic. I find it ironic because that's the place where we're supposed to feel the most comfortable about the way God created us."
When her sister proposed that Rave run No Makeup November, Daniel did not initially want to participate. Although she did not wear makeup often, she needed it to feel put together for special events and work.
But now Daniel is glad she joined the event.
"Personally, I've learned to be just confident," Daniel said. "God made me. He made my eyebrows, my eyelashes. He made my freckles. He made me."