Ukraine's President has asked people everywhere to take to the streets to show their solidarity with his country.
The demonstration would mark one month since the Russian invasion began.
Hundreds of civilians have been killed and more than three million Ukrainians have fled their country since the war started.
Volodymyr Zelenskyy says it's been a "war against freedom".
.@ZelenskyyUa: The war of #Russia is not only the war against #Ukraine.🇷🇺started the war against freedom as it is.
That’s why I ask you to stand against the war! Starting from March 24 - exactly one month after the Russian invasion
All as one together who want to stop the war! pic.twitter.com/BUyqY3DJ37
— MFA of Ukraine 🇺🇦 (@MFA_Ukraine) March 23, 2022
In his first address in English, he urged people to "come with peace".
"Come with Ukrainian symbols, come to support life."
"Make yourself visible and heard. Say that people matters, peace matters, Ukraine matters."
The UN General Assembly is due to vote today on a resolution which blames Russia for escalating the humanitarian crisis in Ukraine
NATO is also set to approve major increases in its forces in eastern Europe.
Meanwhile a EU council summit is taking place in Brussels, where further sanctions will be reviewed.
The Taoiseach will be in attendance, along with US President Joe Biden.