Fausse information ?

Pour Apple, il semble que cette journée n'ait pas été mentionnée dans le passé :

However, no evidence indicated Apple removed International Women's Day from its calendar app, nor did any data show the company featured the day on its calendar in recent years. A spokesperson for Apple said by email that the matter involved a misunderstanding, and that the company did not previously feature International Women's Day — or Women's History Month, also occurring in March — on its standard calendar.

https://www.snopes.com/news/2025/03/07/international-womens-day-apple-google/

Pour Google, ça ne semble pas spécifique à cette journée :

Some years ago, the Calendar team started manually adding a broader set of moments in a wide number of countries around the world — things like cultural celebrations, teachers days and many more. We got feedback that many other events and countries were missing, and it just wasn’t feasible to put hundreds of moments in everyone’s calendars — so in mid-2024 we made the decision to simplify and show only public holidays and national observances from timeanddate.com. Contrary to some of the comments on social media, this was not something we did just this year.

https://blog.google/feed/google-calendar-changes-cultural-moments/