Har Ghar Tiranga campaign was launched for which of the following national day celebrations?

Purpose of the campaign:
The Government of India initiated Har Ghar Tiranga to encourage citizens to hoist the national flag at their homes. The idea was to make the relationship with the flag more personal, moving beyond formal or institutional occasions.
Occasion:
It was specifically tied to Independence Day celebrations, as part of Azadi Ka Amrit Mahotsav — a nationwide program commemorating 75 years of India’s independence.
Dates of observance:
The campaign typically runs in the days leading up to 15th August, inviting people to display the flag from August 13–15 (in earlier editions) or August 2–15 in later years.
Significance:
Promotes patriotism and unity.
Encourages awareness of the national flag’s importance.
Transforms Independence Day into a mass people’s movement rather than just a government-led event.
So, the Har Ghar Tiranga campaign was launched for Independence Day celebrations, not Republic Day or any other national day.