SAN FRANCISCO — Google has for years used its popular online services to remind users about cultural events, marking its Calendar app with occasions such as Black History Month and Women’s History Month.

This month, some users noticed that the popular app was no longer displaying those observances, as well as a litany of others, prompting an online backlash from some users who saw another sign of Google turning against more liberal viewpoints.

But Google said it removed the calendar observances in the middle of last year for apolitical reasons.

Maintaining hundreds of moments manually each year for various countries “wasn’t scalable or sustainable,” a Google spokesperson said in a statement.

The belated uproar happened as Google and other big technology companies have appeared to be reacting to conservative complaints that their products and policies are biased. Just two weeks ago, Google eliminated its goals specifying how much diversity it wanted in its workforce, saying that as a federal contractor, it had to comply with President Donald Trump’s executive orders opposing diversity, equity and inclusion policies.

For more than a decade, Google has worked with timeanddate.com (a website that shows the time, date and major holidays in places around the world) to label public holidays and national observances, such as Presidents Day and Labor Day. Several years ago, the spokesperson said, Google’s Calendar team started marking a broad set of cultural moments in countries around the world, and the company was asked to add more events and countries before it decided that was too unwieldy.