12 May

Born on this day

1948 Joe Tasker, British climber, who ascended Kangchenjunga in 1979. He died on Everest in 1982, aged 34.
1957 Steve Haston, British rock climber and allrounder, who attempted Everest from the North without bottled oxygen in 1999.
1957 Graham Hoyland, British climber, who ascended Everest in 1993.
1959 Cham Yick-Kai, Chinese climber from Hongkong, who ascended Everest in 1992.
1960 Mark Cadman, British climber, who ascended Everest in 2017.
1964 Gao Yu-Hai, Chinese climber, who ascended Everest in 2016.
1965 Li Yong-Sheng (a), Chinese climber, who ascended Lhotse in 2017 and Makalu in 2018.
1966 Antonín Bělík, Czech climber, who ascended Cho Oyu in 2009.
1967 Javier Pérez, Spanish Aragonese climber, who ascended Broad Peak Foresummit in 1997, Lhotse in 2011 and Everest in 2013.
1967 Nawang Tenji, Nepalese Sherpa climber, who ascended Everest twice (2005 and 2007).
1969 Stefan Fürst, Austrian free-climber.
1970 Choi Jong-Tai, Korean climber, who ascended Everest in 1996.
1971 Miki Takahama, Japanese lady climber, who ascended Manaslu RP in 2014.
1972 Zhao Li-Jia, Chinese climber, who ascended Manaslu RP in 2017 and Everest in 2018.
1972 Samad Babazadeh Anari, Iranian climber, who ascended Manaslu M in 2022.
1977 Patrick Dermot Hollingworth, Australian climber, who ascended Cho Oyu in 2009 and Everest in 2010.
1979 Jonathan James (Jon) Kedrowski, American climber, who ascended Everest three times (2012, 2021 and 2024) and Manaslu RP in 2019.
1982 Daniel (Dan) Lochner, American climber, who ascended Everest in 2004.
1982 Hong Yue, Chinese lady climber, who ascended Manaslu M in 2023.
1983 Adam Radosław Bielecki, Polish climber, who ascended Makalu in 2011, Gasherbrum I (first winter ascent) and K2 in 2012, Broad Peak in 2013 (first winter ascent) and Gasherbrum II in 2018.
1984 Ngima Gyalje, Nepalese Sherpa climber, who ascended Makalu in 2014.
1985 Ratnesh Pandey, Indian climber, who ascended Everest in 2016.
1989 Scott Lehmann, American climber, who ascended Everest and Lhotse in 2023, Makalu and Manaslu M in 2024 and Kangchenjunga in 2025.
1991 Benjamin Scott Wright, British climber, who ascended Everest in 2025.
1998 Dawa VII, Nepalese Sherpa climber, who ascended Everest three times (2018, 2022 and 2023).
2000 Sayan Das, American climber, who ascended Everest in 2025.

First ascents on this day

1970 Lhotse Shar (8382 m) by an Austrian party.
1994 Kabru (7412 m) and Kabru South (7318 m) by an Indian party.

Gone on this day

1986 Kim Sung-Gyu, Korean climber, who ascended Dhaulagiri II (7751 m) on that day, died on descent, aged 23.
1988 Stefan Wörner, Swiss climber, who ascended Manaslu M in 1981, Gasherbrum II and Broad Peak in 1983 and Cho Oyu, where he died on descent, aged 38.
2011 Takashi Ozaki, Japanese climber, who ascended Broad Peak in 1977, Everest twice (1980 and winter 1983), Manaslu RP (?) in 1981, Lhotse in 1983, Kangchenjunga in 1984, Shisha Pangma Central-Peak in 1986 and Makalu in 2001, died on Everest, aged 58.
2011 Alain Pierre Marie Laurens (57) and Bernard Jean François Milian (52), French climbers, who ascended Manaslu the day before, died on descent.
2011 Tashi Chhiring, Nepalese Sherpa climber, who ascended Everest twice (2003 and 2006) and Manaslu RP in 2011, where he died on descent, aged 32.