Chalica is a holiday celebrated by some Unitarian Universalists. It traditionally begins on the first Monday in December and lasts seven days,^[1][2] though a seven-week variant beginning in January is also observed.^[3]

Chalica was created as a holiday in 2005 by Daylene Marshall.^[4] While it has gained followers since, it is not a widely celebrated holiday.^[5]

On each of the seven nights (or weeks), a different principle of Unitarian Universalism is honored.^[6] On each day, a chalice is ignited, the day's principle is read, and ways of honoring the principle are enacted, such as volunteering or donating to a social justice cause.^[7][8] There is no rule for how the chalice or display should look, but there are traditionally seven candles around the chalice, one for each principle.^[9] Activities on each day vary, and may include discussions, group activities, and songs.^[10]

To solve the problem of having only a single week in which to cram seven nonnominal deeds for the seven Unitarian Universalist principles, the Unitarian Universalist Church of Bowling Green in Kentucky extends Chalica into a seven-week observance. Further, Chalica at the Unitarian Universalist Church of Bowling Green starts on the first Sunday in January as an extension of the New Year's resolution concept.^[3]