More than 200 schools across Poland have celebrated "Rainbow Friday" with activities promoting tolerance for LGBTIQ+ students.
Joanna Skonieczna, Campaign Against Homophobia coordinator in Warsaw, said the goal of Rainbow Friday was to help young people feel safe and accepted at school.
Bartlomiej Pielak, Vice-principal of High School No 1 in the capital, said it was a "a great opportunity to talk to young people about one of the most difficult topics" in society.
However, several schools cancelled their activities following government pressure and threats in some places.
The education minister of Poland's conservative government, Anna Zalewska, had warned ahead of time that any principals who allowed such events to take place could face negative consequences.
She also asked parents to report any such activities to authorities.
It was not immediately clear how many schools cancelled their plans to participate.