For an October revolution, dress warm. That's the word going out - politely - on the Web to rally street protests on Saturday around the globe from New Zealand to Alaska via London, Frankfurt, Washington and, of course, New York, where the past month's Occupy Wall Street movement has inspired a worldwide yell of anger at banks and financiers.
How many will show up, let alone stay to camp out to disrupt city centers for days, or months, to come, is anyone's guess. The hundreds at Manhattan's Zuccotti Park were calling for back-up on Friday, fearing imminent eviction. Rome expects tens of thousands at a national protest of more traditional stamp.
Few other police forces expect more than a few thousand to turn out on the day for what is billed as an exercise in social media-spread, Arab Spring-inspired, grassroots democracy with an emphasis on peaceful, homespun debate, as seen among Madrid's "indignados" in June or at the current Wall Street park sit-in.
Blogs and Facebook pages devoted to "October 15" - #O15 on Twitter - abound with exhortations to keep the peace, bring an open mind, a sleeping bag, food and warm clothing; in Britain, "Occupy London Stock Exchange" is at pains to stress it does not plan to actually, well, occupy the stock exchange.