This year's Total Defence campaign marks its 30th anniversary by paying tribute to those who have played a role in defending the country.
Organisers say they want to recognise every deed - big or small - that has rallied Singaporeans together.
Colonel Roland Ng, director of the Defence Ministry unit, Nexus, which runs the campaign, said it is about affirming the contributions of people from all walks of life, ranging from a bus driver who greets passengers every morning to a woman who runs a community garden on the rooftop of her HDB block.
The annual Total Defence drive, which started in 1984, reminds Singaporeans of the country's limited resources and of each person's role in defending this place.
Total Defence Day is marked every year on Feb 15, to remember the day in 1942 when Singapore fell to the Japanese in World War II.
Col Ng said: "Total Defence is no longer just about crises and emergencies...it's the meaningful things people do that can bring the community closer."
As part of the appreciation drive, organisers will stage a nine-day interactive exhibition at the National Museum, starting on Feb 15, to feature the stories of everyday Singaporeans and their deeds to strengthen Total Defence.
Organisers are also staging interactive theatre performances that will be travel across the island, a walking trail in the civic district and social dining events.
Those who want to say thank you to fellow Singaporeans can pen their well wishes on special cards that will be available in cafes and shops. The "Thank You" cards are also available on the ConnexionSG Facebook page.