10/10/2013 10:39 EDT

Amanda Todd Anniversary: Light Up Purple Pushes Mental Health (TWEETS)

Amanda Todd died one year ago today and social media is lighting up in purple on the anniversary of the teen's suicide.

The anniversary falls on World Mental Health Day, and her mother Carol Todd is inviting people to honour the occasion by wearing purple, lighting a candle, changing your profile picture or banner on social media, or planning something to promote positive emotional health.

The campaign has gone international, with lights set to turn purple at Science World and BC Place in Vancouver, as well as Niagara Falls, the CN Tower and the Los Angeles airport.

Carol posted a picture of a horse wearing a purple shawl:

In the spirit of Halloween, she also posted this:

Another user riffed on the "Keep Calm and Carry On" poster:

Meanwhile, office workers in Melbourne, Australia carried out a lighthearted take on the campaign:

Check out how Twitter users are honouring Amanda Todd and World Mental Health Day:

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