One Day fans have slammed Netflix for a 'massive spoiler alert' after the streaming giant made a major faux pas on a social media post to celebrate St Swithin's Day. 

The 14-part series first launched on February 8 and stars Ambika Mod, 28, as Emma Morley and Leo Woodall, 27, as Dexter Mayhew.

An adaptation of the 2009 best-selling novel by David Nicholls, the popular rom-com - which has amassed millions of views - follows Emma and Dexter who met on their last day of university on July 15, 1988.

Each episode of One Day revisits the pair on that same date, called St Swithin's Day, over the years.

St Swithin's Day, according to folklore, predicts the weather for the following days - meaning that if it rained on July 15, it will for the next 40 days and 40 nights. 

Ambika Mod, 28, as Emma Morley and Leo Woodall , 27, as Dexter Mayhew in Netflix's 14-part series One Day

Netflix's social media posts on July 15 this year have sparked reaction from some fans

Fans fumed there was no point in watching the hit TV series after Neflix's social media post

The old tale is used as a metaphor for Emma and Dexter's relationship in the series. 

However, Netflix's social media posts on July 15 this year have sparked reaction from some fans. 

One post on X/Twitter yesterday included photos of Leo Woodall as Dexter and said: 'Realising Emma and Dex met today.

'Realising Emma died today.'

Many fans commented how the post had 'spoiled' the show for them, as it revealed a huge part of the plot. 

Others fumed how they weren't going to watch the show after the social media post.

One said: 'Well, you've spoiled that.'

Another added: 'I have read the book and watched the show but surely not everyone has watched it yet. Why would you tweet that spoiler? Social media fail.'

Someone else commented: 'Well thanks, I can take this off my watch list now!'

One user said: 'Wow!! a spoiler warning should have been included lol.'

It comes as yesterday, One Day author David Nicholls paid tribute to Leo Woodall and Ambika Mod as the 'best possible' Dex and Em to mark St Swithin's Day. 

David took to X/Twitter to thank fans for all the support on his book and the subsequent TV series.

He shared unseen clips from the production of the show and posted: 'It's 15th July, St Swithin's Day, 34 years since Em and Dex climbed Arthur's Seat, and I wanted to drop in and say a huge thank you to all the readers, booksellers, publishers and now viewers.

'I'm hugely grateful to the team who made the show with such care and passion, and...to Nicole Taylor and her script team, all at and of course Ambika and Leo, best possible Dex and Em.'

He added: 'I count myself extremely lucky to work with such wonderful friends and colleagues. Hoping for a dry St Swithin's Day. Thank you!' 

The Netflix sensation even led to TikTokers rushing to the filming locations after it was first released. 

One small London cafe, which features for 10 seconds, saw endless queues of fans. 

Leo Woodall’s character, Dexter Mayhew, pictured as he briefly appears to work behind the counter of La Maison in London’s Highbury during the penultimate episode

One small London cafe, which features for 10 seconds, saw endless queues of fans 

Leo Woodall's character briefly appeared to work behind the counter of La Maison in London’s Highbury during the penultimate episode.

The independent coffee shop’s owner told the Daily Mail: 'We have seen a big effect on customer numbers over the weekend and on social media too as it’s been a huge hit on Netflix.'

Despite the ten-second scene and the shop appearing as ‘Cafe Belleville' in the show, fans deciphered its real location and the site became a TikToker hotspot for fans to visit.

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