Women in the United States plan to use International Women's Day to stay off the job and stage demonstrations across the country in an effort to seize on the momentum built from the massive marches held a day after President Donald Trump's inauguration.
On A Day Without a Woman, those who are able to do so will stay away from work or school, much as immigrants did on February 16 to protest Trump's immigration policies.
All are part of the series of anti-Trump demonstrations that have taken place since the day after his November 8 election.
Objectives of Wednesday's events include calling attention to the gender pay gap in which women trail men, and deregulating reproductive rights.
"For years and years, March 8 has been International Women's Day, and it has been a happy, happy day, which is fine," said Terry O'Neill, president of the National Organization for Women. "But the political climate that we find ourselves in right now requires us to have political power."
Demonstrations will target a Trump "gag order" that bars foreign health providers receiving US funds from raising abortion as an option, O'Neill said.
Early Wednesday morning, Mr Trump urged others via his personal Twitter account to join him in honouring the critical role of women in America and around the world.
"I have tremendous respect for women and the many roles they serve that are vital to the fabric of our society and our economy," the Republican president wrote (@realDonaldTrump).
Mr Trump has been heavily criticised for his inflammatory comments when discussing women, including his boast in a 2005 video about grabbing women by the genitals, and referring to Democratic rival Hillary Clinton as a "nasty woman" during a presidential debate.
American women on average earn 79 US cents for every US$1 that men make, and African-American and Latina women make even less, O'Neill said. Since women account for two-thirds of all minimum wage workers, lifting the hourly wage would significantly narrow the pay gap, she said.
The minimum wage has been stuck at US$7.25 at the federal level since 2009, although it is higher in many states.
Women make up 47 percent of the US civilian labour force.
If all of them stayed out of work for the day, it would knock almost $US21 billion of the country's gross domestic product, the liberal-leaning Center for American Progress estimated.
Organisers, however, realise that many women lack the motivation or cannot afford to take a day off and are urging women to limit their shopping to female-owned businesses or to wear red.
Several schools, including at least two sizeable school districts in Virginia and North Carolina, have cancelled classes because a large number of teachers requested the day off.