Rallies in support of Israel are taking place at 27 different locations across Finland on Monday evening.
In addition to a large-scale procession in the centre of Helsinki. there are similar events being held in other major cities such as Tampere, Turku, Jyväskylä, Kuopio and Oulu.
The organisers of the demonstrations say they want to show support for Israel, their opposition to terrorism and to demand the release of Israeli citizens kidnapped during the attack by Hamas last year.
Monday 7 October marks one year to the day since Hamas launched an attack on Israel, during which 1,200 people were killed and 251 taken hostage. About 100 Israelis are believed to still be in captivity.
Markus Landberg, executive director of the Karmel Association of Finland — one of the organisers of Monday's events — told Yle that he is participating in the demonstration both in an official capacity as well as for personal reasons.
"I have close and dear friends there. I know that the attack by Hamas a year ago has caused a lot of pain. In this way, I want to show support to the victims of terrorism and those who are still being held," Landberg said, adding that the demonstration is a means of showing solidarity with the people of Israel.
"We wait and hope for peace in the Middle East and Israel," he said.
The organisers are also asking members of the Finnish public to sign a petition calling on Finland to change its policies regarding Israel at the United Nations.
Finland voted in favour of a UN General Assembly resolution condemning Israel’s occupation of Palestinian territories last month.
According to the Hamas-run health ministry in Gaza, an estimated 42,000 people have been killed during Israel's military campaign, which was launched in response to the Hamas attack.