People across the country are being urged to "Shine Your Light" at 9pm tonight to honour frontline staff and healthcare workers tackling the Covid-19 pandemic.
Everyone is invited to take part in a gesture intended to express hope as well as remember those who have died and their loved ones.
President Michael D Higgins and his wife Sabina will take part from Áras an Uachtaráin while Irish embassies and missions around the world are participating as well.
Many people will be lighting a candle at home but some buildings are getting involved too.
The Dublin Waste to Energy Facility in Dublin will be lit blue.
Project director Kieran Mullins says it will be visible across the city.
"It's being lit up from dusk until about 2am so certainly anybody in the Sandymount and Merrion area will see it and you can see the plant from other areas, high areas of Dublin such as the Dublin mountains.
"We hope that when people do see it that it will remind them also to continue the effort that they are making."
Last night on the Late Late Show, Glen Hansard and Colm Mac Con Iomaire played Leave A Light to highlight the initiative.
Later in the show, the pair performed Falling Slowly in memory of those in Ireland who have died during pandemic.
Introducing the song, Ryan Tubridy said: "This is for the 288 Irish men and women who are no longer with us and may they rest in peace."
Hansard and Mac Con Iomaire are not the only public figures who are backing the Shine A Light campaign.
Other public figures offering their support and taking part include Gabriel Byrne, Saoirse Ronan, Sinéad O'Connor, Paula Meehan and Marie Mullen.
RTÉ will air a special live broadcast across RTÉ One, RTÉ Radio 1 and the RTÉ Player.
- Shop for essential food and household goods;
- Attend medical appointments, collect medicine or other health products;
- Care for children, older people or other vulnerable people - this excludes social family visits;
- Exercise outdoors - within 2kms of your home and only with members of your own household, keeping 2 metres distance between you and other people
- Travel to work if you provide an essential service - be sure to practice physical distancing