Our editors will be looking ahead today to these developing stories ...
Dousing the lights for Earth Hour
Sydney becomes one of the first cities to mark Earth Hour, the annual environmental campaign to encourage global sustainability, by turning off the lights on the Opera House and the harbour bridge. More than 7,000 cities around the world will turn off their lights at 8.30pm for one hour. In Hong Kong the global conservation body WWF and the faculty of science of the University of Hong Kong are holding a "light pollution science roadshow" on the Avenue of Stars in Tsim Sha Tsui, which includes a video show, exhibition and interactive demonstrations.
Archive celebrates Chow's achievements
Golden Harvest co-founder Raymond Chow gives the first of four seminars that accompany an exhibition celebrating the 30-year history of his pioneering film studio at the Hong Kong Film Archive. The exhibition, "Golden Harvest: A landmark in Hong Kong cinema", features sets of some classic scenes, photos, posters and magazines. The archive is also running a movie retrospective, "The cinematic matrix of Golden Harvest", until June 30 and will screen 63 of the studio's 600 films.
Exhibition celebrates Bowie's musical life
In London the Victoria and Albert Museum opens a retrospective of singer David Bowie's career. "David Bowie Is" features more than 300 objects, including handwritten lyrics, original costumes, fashion, photography, film, music videos, set designs and Bowie's own instruments and sketches. It explores the creative processes of Bowie as a musical innovator and cultural icon, tracing his shifting style across five decades.
Chief executive digs in for the planet
Hong Kong's Chief Executive Leung Chun-ying officiates at Hong Kong Tree Planting Day 2013 at Sai Kung (East) Country Park High Island Reservoir. He has invited 1,000 members of the PLA as well as officials from the liaison office to attend. Started in 1998 with an aim to beautify Hong Kong, this is the largest annual tree planting event in the city and attracts thousands of volunteers every year.
Historic meeting for pope and predecessor
Pope Francis travels a few kilometres outside Rome to the hilltop town of Castel Gandolfo, the summer papal residence, to meet his predecessor Benedict. The former pope has been staying there since he resigned and left the Vatican on February 28. It will be the first time a reigning pontiff meets a former one since the Middle Ages, with both expected to wear the papal white vestments.
A great day for a chat about the weather
Today is World Meteorological Day, created to remember the World Meteorological Organisation's establishment in 1950. The WMO became a United Nations agency in 1951. This year, the theme is, "Watching the weather to protect life and property".