Burton was 24 when Metallica’s tour bus crashed in Sweden on September 27, 1986. He was killed in the accident.
Ulrich says that he thinks of his friend most days, but anniversaries are more painful than other days.
The drummer tells Metal Hammer: “He’s continuously a part of our legacy. There are days when I still think about him. Today is a, I hate the word ‘anniversary’, but today is a more relevant Cliff Day because of the date.
“I’m always aware of the date. I think that, when you’ve been around for 35 years like we have, and you actually sit down and go through everything and plant flags on the calendar, there always so many anniversaries, but obviously, September 27, 2016, feels like a very significant date.
“I’m thinking about him all the time.”
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Burton was also remembered by Metallica’s first managers Jon and Marsha Zazula in a feature published by TeamRock.
Lollapalooza Brazil takes place on March 25 to 26 at Autodromo de Interlagos in Sao Paulo, the Argentina leg takes place from March 31 to April 1 at Hippodromo de San Isidro in Buenos Aires and the Chile event is held from April 1 to 2 at O’Higgins Park in Santiago.
Metallica’s 10th album Hardwired…To Self-Destruct is released on November 18 via the band’s own Blackened Recordings label.
Metallica 2016 live dates
Sep 27: New York Webster Hall, NY
Oct 22: Mountain View Shoreline Amphitheatre, CA
Oct 23: Mountain View Shoreline Amphitheatre, CA
Oct 26: San Juan Coliseo De Puerto Rico, Puerto Rico
Oct 29: Quito Parque Bicentenario, Ecuador
Nov 01: Bogota Hipodromo De Los Andes, Columbia
Nov 03: Guatemala City Estadio Cementos Progreso, Guatemala
Nov 05: San Jose Estadio Nacional, Costa Rica
Mar 25-26: Lollapalooza Brasil
Mar 31-Apr 01: Lollapalooza Argentina
Apr 01-02: Lollapalooza Chile