On the Sunday of Life...

{{Use dmy dates|date=January 2021}}

{{Use British English|date=December 2012}}

{{Infobox album

| name = On the Sunday of Life...

| type = studio

| artist = Porcupine Tree

| cover = porcupine tree on the sunday of life.jpg

| alt =

| caption = Cover art by Andy Cleal

| released = 21 April 1992{{cite magazine |title=New Albums |magazine=Music Week |date=18 April 1992 |page=16}}

| recorded = 1988–1991

| venue =

| studio = No Man's Land (Hemel Hempstead, Hertfordshire, England)

| genre = Progressive rock, psychedelic rock, space rock

| length = 75:47

| label = Delerium

| producer = Steven Wilson

| prev_title = The Nostalgia Factory

| prev_year = 1991

| next_title = Up the Downstair

| next_year = 1993

}}

{{Album ratings

| rev1 = Allmusic

| rev1Score = {{Rating|3|5}}{{cite web |url= http://www.allmusic.com/album/r342280 |title=On the Sunday of Life - Porcupine Tree | AllMusic |first=Ned |last=Raggett |publisher=AllMusic|year=2011 |access-date=6 July 2011}}

}}

On the Sunday of Life... is the debut album of English progressive rock band Porcupine Tree, first released on 21 April 1992. It compiles tracks that Steven Wilson produced and recorded for two cassette-only releases, Tarquin's Seaweed Farm (1989) and The Nostalgia Factory (1991). The rest of the music from these tapes was released three years later in the compilation album Yellow Hedgerow Dreamscape.

Most of the lyrics were written by Alan Duffy, a school friend with whom Steven Wilson had lost touch a few years before the album was released. The album title was chosen from a long list of nonsense titles compiled by Richard Allen of Delerium. The song "Nine Cats" dates back to at least 1983, originally being recorded by Karma, a band Wilson had played in during that time, and released on the band's EP The Joke's on You.

A small run of 1,000 copies in a deluxe gatefold sleeve was released in early 1992.{{cite web|url=http://www.porcupinetree.com/background.cfm|title=Porcupine Tree - Background|publisher=porcupinetree.com|access-date=2008-04-06}} The album, over time, eventually sold in excess of 20,000 copies.{{cite web |url=http://www.ultimate-guitar.com/interviews/interviews/steven_wilson_porcupine_tree_was_gonna_be_a_one-off_thing.html |title=Archived copy |access-date=2012-04-18 |url-status=dead |archive-url=https://web.archive.org/web/20120419071153/http://www.ultimate-guitar.com/interviews/interviews/steven_wilson_porcupine_tree_was_gonna_be_a_one-off_thing.html |archive-date=19 April 2012}}

The version of "Radioactive Toy" that featured on the album is re-recorded. The original version was later released on Yellow Hedgerow Dreamscape. In addition, the original versions of "The Nostalgia Factory", "Queen Quotes Crowley", and "This Long Silence" are about a minute shorter on this album.