Donald Trump and Melania Trump
Donald Trump and Melania Trump, pictured June 4, 2017 at Ford's Theatre's annual fundraiser in Washington, DC, June 29 celebrates Heterosexual Pride Day. Getty Images

Coming on the heels of the LGBTQ community's month-long Gay Pride celebrations, Twitter users mocked the existence of Heterosexual Pride Day Thursday. The holiday quickly became one of the top-trending topics on the website with thousands of mentions.

While Heterosexual Pride Day is arguably amongst a long list of unusual and unnecessary holidays, how did the straight-love celebration come to be?

Read: LGBTQ Rally: DC And Country Celebrate Pride, Trump Stays Silent

When the first gay pride parade surfaced in the 1970s to acknowledge the discrimination the gay community received, it led some individuals to question why they don't honor their heterosexuality. Heterosexual Pride Day emerged in the early 1990s as a response to Gay Pride movement, according to New York Daily News.

Is there a need for Heterosexual Pride Day? Advocates for the celebration claimed so.

Social conservative groups have unsuccessfully organized the straight-only events and campaigns, including the Seattle-based one-man Heterosexual Pride Parade in 2015 — which included an open Facebook invitation.

"There is a lot of negativity pouring in from the gay, bisexual, transgender communities. Kind of a double standard if you ask me," Anthony Robello, the parade's organizer, said in 2015. "We mean no harm by celebrating. This is a positive event for heterosexuals. If you don't like the fact that we are having a parade to celebrate our beliefs, feel free to show up and protest."

In 1991, The New York Times reported on a related rally that occurred at the University of Massachusetts at Amherst. The event was led by the campus' top conservative groups including the Republican Club, Young Americans for Freedom, the New Americans and The Minuteman (the college's newspaper). Although organizer's claimed the parade would "not consist of an hour of gay-bashing," gay rights activists had killed the event's momentum.

The trending hashtag that Twitter users have spotted didn't arrive until June 2016.

Read: Pride Month: Facebook Adds New LGBTQ Features To Site, Messenger To Help Users Celebrate June

Sam, a mononymous Twitter user whose account is currently suspended, launched #HeterosexualPrideDay on Twitter because he didn't understand why straight people attended Pride Month events. According to BBC, the anonymous user's hashtag went viral after he tweeted, "As the official #HeterosexualPrideDay creator, direct all tweets of disapproval of this holiday to me and me only."

This year, LGBT activist Eric Rosswood reignited the hashtag, saying: "It's that time of year again when all the homophobic people complain about not having a #HeterosexualPrideDay and here's the annual response."

His tweet included a statement, claiming heterosexuals should be "thankful" that they don't need a celebration to honor their sexuality.

Although some individuals have taken #HeterosexualPrideDay seriously and showed their support for the "holiday," Twitter users primarily provided negative feedback against the unusual occasion. One user wrote: "Asking why there isn't a heterosexual month is like asking why there isn't a white history month, makes no since #HeterosexualPrideDay."

Another user shared their support for the holiday, saying: "As a gay man, I'm all for #HeterosexualPrideDay It's about equality, not special treatment. Everyone should have pride in who they are!"

Amanda Deibert, a writer for "OWN Tonight" and other projects, disregarded the holiday and changed the direction of the conversation by asking her followers to share their struggles with homosexuality.

"Please tweet me your struggles coming out as straight to your family," Deibert wrote. "If they disowned you for it know we support you. #HeterosexualPrideDay."

Here are 10 other tweets that have surfaced from #HeterosexualPrideDay:

What are your thoughts on Heterosexual Pride Day?

Follow me on Twitter @dory_jackson