A century after women first won the right to vote in the UK, politicians, activists and social media users have paid tribute to the women who helped to force a change in the law.
The hashtag #100Years is trending worldwide, used more than 40,000 times on Twitter.
Some social media users celebrated the contribution of women who campaigned for the right to vote.
Others marked the occasion by highlighting work still to be done.
Who are people talking about?
The names of several prominent suffrage campaigners have been trending.
BBC Radio 4 listeners voted Suffragist Dame Millicent Fawcett as the 'most influential' woman of the past 100 years, but Suffragette Emmeline Pankhurst has been mentioned almost 3,000 times on Twitter in the past 24 hours.
Suffragettes and Suffragists both campaigned for a change in the law which would grant women the right to vote, but favoured different methods.
Tributes to other campaigners, including Sylvia and Christabel Pankhurst, and Emily Davison, a Suffragette who died when she ran in front of the King's horse during the 1913 Epsom Derby, have also been made by thousands.
What are women in politics saying?
Labour MP for Birmingham Yardley Jess Phillips was among scores of politicians from all parties to mark the centenary online.
The Prime Minister shared a picture of female MPs gathered in Parliament.
"I'm proud that there are over 200 female MPS," she wrote. "Our democracy is stronger as a result."
What better way to start today's #Vote100 celebrations than by gathering with all the talented female MPs in Parliament. More must be done, but I'm proud that there are over 200 female MPs - our democracy is stronger as a result. pic.twitter.com/Gy7Y6AJVup— Theresa May (@theresa_may) February 6, 2018
Arlene Foster, leader of the DUP, the largest party in the Northern Ireland Assembly, and Nicola Sturgeon, the SNP First Minister of Scotland, also paid tribute to Suffragist and Suffragette campaigners.
A lot has changed in 100 years. The suffragist movement sparked a change in society and inspired many to enter politics. We are indebted to those who helped push forward our democracy and the freedoms which we enjoy today #Vote100 #Suffragette100 pic.twitter.com/T1aNBFBOtz— Arlene Foster (@DUPleader) February 6, 2018
This was once the site of Calton Jail where many Suffragettes were imprisoned. Today, it is the seat of @ScotGov and the Suffragette flag is flying high. Thank you to all the women who fought for our right to vote - and enabled a woman to occupy the office of FM. #vote100 pic.twitter.com/efmGJ0VGqu— Nicola Sturgeon (@NicolaSturgeon) February 6, 2018
Prominent individuals outside of politics have also marked the anniversary.
Sir Paul McCartney referenced his Wings song Jet in congratulating "all of us on the 100th anniversary of the Suffragette movement".
Congratulations to all of us on the 100th anniversary of the Suffragette movement. Amazing to think that #100years ago women weren't allowed to vote & wonderful to realise the progress that's been made in many countries. Let’s celebrate this great anniversary together. Love Paul pic.twitter.com/PMMNvPZKon— Paul McCartney (@PaulMcCartney) February 6, 2018
More to be done?
Many people marked the centenary by highlighting progress they say has yet be made.
Channel 4 News presenter, Cathy Newman, pointed out "fewer than one third of MPs are female" and "all chancellors to date have been men," adding, "history still needs to be made".
100 years since women got the vote, fewer than 1/3 of MPs are female, all chancellors to date have been men, more than 90% of PLC executive directors are men & women are yet to serve in close combat roles (though some are in training). History still needs to be made! #100years— Cathy Newman (@cathynewman) February 5, 2018
Referencing the exclusion of some women from enfranchisement in 1918, novelist and broadcaster Bonnie Greer said political life for a woman is still "different, harder, less rewarding, more dangerous than it is for a man".
The Jo Cox Foundation, a charity set up after Ms Cox's murder in 2016, shared pictures of the former MP as a 14-year-old visiting Downing Street on a school trip.
Jo had the highest ambitions for herself & all women. Here she is on a school trip on the steps of No 10 age 14 (far left). #100years since some women won the vote there's lots to be proud of but a long way to go to ensure all women have access to power & democracy #stillmarching pic.twitter.com/zx6AsIZweF— Jo Cox Foundation (@JoCoxFoundation) February 6, 2018
By UGC and Social News team