National Handloom Day is observed every year on 7 August by the Government of India to honour the handloom weaving community and to highlight the importance of the handloom sector to India's economy, employment, and cultural heritage.

The date was deliberately chosen to commemorate the Swadeshi Movement, launched on 7 August 1905 in Calcutta (now Kolkata) as a protest against the partition of Bengal by the British colonial government. The movement urged Indians to boycott foreign-made goods, especially British textiles, and to promote indigenous, handmade products instead, giving a major boost to India's domestic handloom and textile industries at the time.

The observance has, since its inception, been used each year to:

• Recognise the socio-economic contribution of the handloom sector, which employs a very large number of weavers, particularly in rural India, and remains one of the largest cottage industries in the country after agriculture.
• Create awareness among consumers about the value, craftsmanship, and heritage embedded in handwoven textiles, encouraging them to choose handloom over machine-made alternatives.
• Showcase and support weaver communities through exhibitions and promotional initiatives, including certification schemes that identify genuine, high-quality handloom products.

None of the other dates given corresponds to this observance — they mark other national or international days entirely unrelated to handlooms, which is why 7 August alone is the correct answer.