The hottest curatorial trend ever to get experts scratching their knowledgeable heads is about to return.

Organisers have announced that Ask a Curator Day, the annual 24-hour tweetfest allowing audiences to quiz curators from museums and galleries across the world, will take place on September 19 this year.

Venues from Australia and Austria to Sri Lanka and Slovenia have already signed up – among the 25 countries involved so far, New Zealand’s Fresh Gallery Otara, Chile’s Museo Nacional de Historia Natural and the Johannesburg Art Gallery – the largest museum of art in South Africa – are a few of the early enlistees.

And authorities on oddities from more than 100 museums and galleries ensure the UK will be keenly represented: the Kelvingrove in Glasgow, the National Library of Wales and museum and gallery groups in Leeds, Lancashire, Birmingham and beyond will fly the potentially fuddled flag.

• Visit www.askacuratorday.com for all the details, visit the campaign on Twitter and use the hashtag #AskACurator to take part.
  
  Interested venues can read a curator's blog on why to take part or email info@askacuratorday.com to find out more.