From Google News

Heading out on October 1, you might notice a number of prominent buildings in the city being lit up in pink. Confused? October is International Breast Cancer Awareness month, and organisations across the world illuminate prominent buildings of their cities in pink — a colour that is used to demonstrate breast cancer Awareness.

The idea was started by Evelyn Lauder of Estee Lauder group of companies, when she lost her sister to breast cancer. She was a pioneer in making the now ubiquitous pink ribbon a symbol of international breast cancer awareness. After more than a decade, this pink campaign has caught on worldwide. Prominent buildings such as White House and the Empire State Building in the US, Buckingham Palace, Tower of London, Victoria Memorial and Nelson's Column in the UK, Eifel Tower in Paris and others are illuminated in October.
In mana Hyderabad, Ushalakshmi Breast Cancer Foundation has been illuminating prominent buildings in the colour since the last four years, to spread the message of hope, survival and courage. Also to remind people that women over 40 must get themselves an annual screening for mammogram to detect this disease early. Since breast cancer is non-preventable, the only way to fight it is by detecting it early.
Like previous years, a number of historic and prominent buildings will be lit up in pink this year as well. On October 1, watch the Legislative Assembly, Charminar, Buddha Statue, Prasads IMAX, KIMS Hospitals and Times of India Building turn pink.