Title: How Deep Is Your Love (Calvin Harris and Disciples song)
Content:  "How Deep Is Your Love" is a song by Scottish DJ and record producer Calvin Harris and English production trio Disciples. It was released on 17 July 2015. It features uncredited vocals by Norwegian singer and songwriter Ina Wroldsen. The single received generally positive reviews, and was commercially successful, reaching the top-ten in 22 countries, including number two on the UK Singles Chart and number one in Australia, Belgium, Greece, the Netherlands and Russia.
Title: How Deep Is Your Love? (The Rapture song)
Content:  "How Deep Is Your Love?" is a song by American dance-punk band The Rapture. It was initially released as the lead single from the band's third studio album In the Grace of Your Love on June 13, 2011 as a single-sided 12-inch single through DFA Records. The song was remixed by Emperor Machine, as part of Adult Swim's 2011 Singles Program. The song peaked at number 19 on the Belgian Flanders Tip singles chart.
Title: How Deep Is Your Love (Sean Paul song)
Content:  A music video to accompany the release of "How Deep Is Your Love" was first released onto YouTube on 4 October 2012 at a total length of three minutes and twenty-seven seconds. The music video premiered on BET's 106 & Park on 2 October 2012, when Sean Paul visited the show to premiere the video.
Title: How Deep Is Your Love (Dru Hill song)
Content:  "How Deep Is Your Love" is an R&B single by group Dru Hill. It is the first single from the group's second album, Enter the Dru. The song was released on September 22, 1998. It spent three weeks at number-one on the US R&B chart, and peaked at number three on the US Billboard Hot 100 chart. The song, in its single version with rapper Redman, was also used in the end credits and is featured on the soundtrack to the 1998 film Rush Hour. To date, this is Dru Hill's highest charting hit.
Title: Deeper Love
Content:  "Deeper Love" is a song performed by David Longoria and CeCe Peniston, released on Del Oro Music in 2005. The single release included eleven remixes in total (among others also from Junior Vasquez, Ryan Humphries, L.E.X., and Richard Earnshaw). The song peaked at number fourteen in the Billboard Hot Dance Music/Club Play on November 19, and remained in the chart for eleven weeks in total.
Title: How Deep Is Your Love (Sean Paul song)
Content:  "How Deep Is Your Love" is the fifth single from the Jamaican recording artist Sean Paul's fifth studio album Tomahawk Technique, featuring American singer Kelly Rowland. It was written by Mikkel S. Eriksen, Jason Henriques, Ester Dean, Sean Paul Henriques and was produced by Stargate. It was released as a digital download in the United States on 24 July 2012. The song has charted in Switzerland and Austria.
Title: How Deep Is Your Love (Bee Gees song)
Content:  "How Deep Is Your Love" is a pop ballad written and recorded by the Bee Gees in 1977 and released as a single in September of that year. It was ultimately used as part of the soundtrack to the film Saturday Night Fever. It was a number-three hit in the United Kingdom and Australia. In the United States, it topped the Billboard Hot 100 on 25 December 1977 (becoming the first of six consecutive US number-one hits), ended the 10-week reign of Debby Boone's "You Light Up My Life" and stayed in the Top 10 for 17 weeks, being the first song to spend 17+ weeks in the top ten since Chubby Checker's The Twist. It was also the longest song to be in the top ten in one run. It would hold the record until "End of the Road" by Boyz II Men. The single spent 
Title: How Deep Is Your Love (Calvin Harris and Disciples song)
Content:  On 3 June 2015, Harris announced an upcoming collaboration with London-based production trio Disciples. The song leaked on 15 July 2015, two days prior to its official release. The song first materialised when London-based band Disciples and Norwegian singer-songwriter Ina Wroldsen co-wrote it in early 2014. They recorded the vocals of Wroldsen in one take for the demo. Two of the artists from Disciples who are published by Fly-Eye (Harris's publishing company) decided to send him the rough demonstration for feedback and pointers. Harris loved the track and eventually proposed collaborating on it together. Harris told radio KISS-FM that following the release of Motion, he wanted to do something else, something a bit different. He wanted a single out for the summer because it had been so long since it had happened. "I missed the feeling of having a new song out in the summer." "How Deep Is Your Love" is a deep house song. Your EDM described it as an "upbeat tune", containing "bass-y plucks and piano chords". For Hayden Manders of Nylon, the track is influenced by 90s Euro house and compared it to Disclosure's music.
Title: How Deep Is Your Love (Calvin Harris and Disciples song)
Content:  "How Deep Is Your Love" entered at number seven on the UK Singles Chart, giving Harris his 19th top ten hit on the chart. The song eventually peaked at number two. The song debuted at number five on the US Hot Dance/Electronic Songs. It sold 41,000 downloads and captured two million U.S. streams (the bulk of which, 74 percent, came from Spotify) in its first week. It marked Harris' eighth top ten since the chart's launch, making it the most of any act (previously, he was tied with Zedd at seven each). Additionally, the song debuted at number four on Dance/Electronic Digital Songs and at number six on the Dance/Electronic Streaming Songs. On its tenth week, it has hit number three 
Title: How Deep Is Your Love (Bee Gees song)
Content:  the new wave and punk rock out, I would have thought something like 'How Deep Is Your Love' wouldn't have a chance. We always kept going forward and we're getting stronger every day". Billboard described the song as a "a warm tender ballad," saying that after a slow beginning it grows to a "heightened expressive delivery." The song won Best Pop Performance by a Group at the 20th Grammy Awards which were held on 23 February 1978. The song also received a nomination for Best Original Song at the 35th Golden Globe awards held on 23 January 1964. The award went to "You Light Up My Life" by Kasey Cisyk. At the time of both award ceremonies, the song was still in the Top 10 on the Billboard Hot 100 chart.

Question: when was how deep is your love released?
Answer: 1977.
September 1977.