What is the truth?: The photograph shows people attending a 'Shahid Dibas' or Martyr's Day rally on 21 July 2017 in Kolkata, West Bengal.
How did we find out?: Using Google Lens, we ran a reverse image search on the viral photograph.
This led us to a post dated 21 July 2017, shared by West Bengal Chief Minister and Trinamool Congress (TMC) leader Mamata Banerjee's verified Facebook page.
Banerjee's post carried multiple photos – including the one in the claim – and mentioned that it showed the 24th year of commemorating "Sahid Dibas."
The date - 21 July - marks Shahid Dibas, or Martyrs' Day in West Bengal, commemorating the day 13 political workers killed by police firing in 1993.
On comparing one of these photos to the viral image, we saw that both were the same.
The fencing at the bottom of the photos, and a yellow board above blue tarpaulin are seen in both pictures.
Taking a cue from this, we looked for more photos of the event.
On Getty Images, a stock photos website, we came across a zoomed out version of the same photograph, from July 2017.
Conclusion: A 2017 photograph of people in West Bengal's Kolkata commemorating Martyr's Day, at an event organised by the Trinamool Congress is being shared as that of an Aam Aadmi Party roadshow in Gujarat.
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