Today is June 4, the 26th anniversary of the Tiananmen Square pro-democracy protests of 1989.

In recent years, some numbers have gone missing on the Chinese Internet because of censorship. These numbers are 64, 89 and 535 — which stands for May 35, a popular way to refer to June 4. They are all unsearchable on mainland Chinese search engines and cannot appear in public timelines on social media.

Political cartoonist Biantailajiao highlighted such ridiculous way of erasing history on Twitter:

如果可以做到，他們會毫不猶豫讓這一天從日曆上徹底消失 pic.twitter.com/5ERnYBn63o

— 变态辣椒 (@remonwangxt) June 3, 2015

If possible, they would delete this particular date from the calendar.