TSI) are short-term campaigns through which participants refrain from drinking alcohol for a period of time, typically a month, and (although not always formally required) concurrently raise money for a sponsored charity by soliciting donations. Better known by names such as FebFast and Dry January, these increasingly popular initiatives fuse the current fashion of channelling philanthropic engagement through the body (as seen in charity campaigns such as Movember and charity fun runs) with the broader public health concerns seeking to address what have been deemed to be problematic drinking cultures in places such as Australia, the United Kingdom and Finland. 1 Having begun in Finland 2005 but developed in earnest starting from Australia in 2008, these initiatives emphasise a combination of charitable giving, responsibility for one's personal health, and awareness of alcohol's effects and social ubiquity. From their origins as grassroots campaigns, TSI have multiplied and crossed borders. Like many social movements of the 21 st century, TSI have used existing philanthropic networks and the connectivity afforded by the Internet and social media to exceed their small-scale origins and become international movements and major fundraisers. 2 To wit, in 2017, Australia's Dry July campaign raised nearly 4.3 million (Australian) dollars, not counting the fund raised in its New Zealand and British spin-offs, and a British survey reported that roughly one in six members of the adult drinking population intended to have a Dry January. 3 TSI portray themselves as novel and innovative responses to crises of binge drinking and the creeping cultural ubiquity of alcohol. 4 Cognisant of the reputation of temperance movements as archaic and moralistic organisations, most are at pains to keep temperance associated with the 19 th and early 20 th centuries. 5 Despite the apparent and arguably deliberate disconnect between TSI and temperance, TSI have deep but unacknowledged roots in temperance. Like the transnational temperance movements that gained in popularity from the 1870s, TSI found greatest favour in English-speaking countries, spreading from the Antipodes first to Europe and then to