eibram Great project! but there is lots of incorrect jerseys dates, which needs to be corrected.
So i check your jerseys which are in your website and made a complete list with proves so you can focus on this list and confident update these jerseys dates (you have these jerseys in your website already, just needs to update to these dates):
Atlanta Hawks 1992/1995 black jersey date should be 1994/1995
NBA alternate jerseys debuted in the 1994/1995 season.
Here is prove:
https://www.gettyimages.com/detail/news-photo/atlanta-hawks-guard-steve-smith-loses-the-ball-as-he-news-photo/51972821#/atlanta-hawks-guard-steve-smith-loses-the-ball-as-he-collides-with-picture-id5197282
Hawks vs Pacers game stats:
https://www.basketball-reference.com/boxscores/199504290IND.html
Another prove:
https://en.wikipedia.org/wiki/Third_jersey
Another prove:
https://en.wikipedia.org/wiki/1994–95_Atlanta_Hawks_season
Another prove:
http://www.sportslogos.net/logos/view/5fi4tkwpl606emuxyrgdf7eq8/Atlanta_Hawks/1995/Alternate_Uniform
Atlanta Hawks 2002/2007 yellow jersey date should be 2004/2007
Here is prove:
http://www.sportslogos.net/logos/view/0ujrmyeekkej4ltcef9hq1b8o/Atlanta_Hawks/2005/Alternate_Uniform
Charlotte Hornets 1989/1996 white jersey date should be 1988/1997
Here is prove, that Hornets still played with this home jersey till the 1996/97 season:
http://www.gettyimages.com/detail/news-photo/guard-glen-rice-of-the-charlotte-hornets-drives-past-guard-news-photo/1397255
NBA All Star game 1997 game stats:
http://www.basketball-reference.com/allstar/NBA_1997.html
Charlotte Hornets 1989/1996 teal/green jersey date should be 1988/1997
Here is prove, that Hornets still played with this away jersey till the 1996/97 season:
http://www.gettyimages.com/detail/news-photo/guard-glen-rice-of-the-charlotte-hornets-dribbles-the-ball-news-photo/1397408
http://www.gettyimages.com/detail/news-photo/center-vlade-divac-of-the-charlotte-hornets-jumps-to-the-news-photo/1397383
Hornets vs Clippers game stats:
http://www.basketball-reference.com/boxscores/199612030LAC.html
Charlotte Hornets 1994/1996 purple jersey date should be 1994/1997
Here is prove, that Hornets still played with this alternate jersey till the 1996/97 season:
http://www.gettyimages.com/detail/news-photo/playoffs-charlotte-hornets-glen-rice-in-action-vs-new-york-news-photo/482860278#basketball-nba-playoffs-charlotte-hornets-glen-rice-in-action-vs-new-picture-id482860278
Hornets vs Knicks game stats:
http://www.basketball-reference.com/boxscores/199704240NYK.html
Charlotte Hornets 1996/2002 white jersey date should be 1997/2002
Here is prove, that Hornets started playing with this home jersey from the 1997/98 season:
http://www.gettyimages.com/detail/news-photo/matt-geiger-of-the-charlotte-hornets-during-the-game-news-photo/469162823
http://www.gettyimages.com/detail/news-photo/detlef-schrempf-of-the-seattle-supersonics-looks-to-move-news-photo/469162777
Hornets vs SuperSonics game stats:
http://www.basketball-reference.com/boxscores/199803060CHH.html
Another prove:
http://www.gettyimages.com/detail/news-photo/bobby-phills-of-the-charlotte-hornets-during-the-game-news-photo/470128561
Hornets vs Warriors game stats:
http://www.basketball-reference.com/boxscores/199803020CHH.html
Charlotte Hornets 1996/2002 teal/green jersey date should be 1997/2002
Here is prove, that Hornets started to playing with this away jersey from the 1997/98 season:
http://www.gettyimages.com/detail/news-photo/guard-bobby-phills-of-the-charlotte-hornets-dribbles-around-news-photo/329283
Hornets vs Wizards game stats:
http://www.basketball-reference.com/boxscores/199712190WAS.html
Chicago Bulls 1997/1998 black jersey date should be 1997/1999
Here is prove, that Bulls still played with this alternate black jersey till the 1998/99 season:
https://www.gettyimages.com/detail/news-photo/kornél-dávid-of-the-chicago-bulls-drives-ball-down-court-news-photo/545519692
Bulls vs Bucks game stats:
https://www.basketball-reference.com/boxscores/199902170MIL.html
Cleveland Cavaliers 1974/1981 yellow jersey date should be 1974/1980
Here is prove: http://www.cavshistory.com/jerseys/
Cleveland Cavaliers 1974/1981 red jersey date should be 1974/1980
Here is prove: http://www.cavshistory.com/jerseys/
Cleveland Cavaliers 1981/1983 yellow jersey date should be 1980/1983
Here is prove: http://www.cavshistory.com/jerseys/
Cleveland Cavaliers 1981/1983 red jersey date should be 1980/1983
Here is prove: http://www.cavshistory.com/jerseys/
Cleveland Cavaliers 2003/2010 blue jersey date should be 2005/2010
Here is prove: http://www.cavshistory.com/jerseys/
Detroit Pistons 1997/2001 red jersey date should be 1999/2001
Here is prove, that Pistons started to playing with this alternate red jersey from the 1999/00 season:
http://www.gettyimages.com/detail/news-photo/shaquille-oneal-of-the-los-angeles-lakers-makes-a-layup-news-photo/497991
Pistons vs Lakers game stats:
http://www.basketball-reference.com/boxscores/199912120LAL.html
Indiana Pacers 1999/2005 yellow jersey date should be 1998/2005
Here is prove, that Pacers started to playing with this alternate yellow jersey from the 1998/99 season:
http://www.gettyimages.com/detail/news-photo/marcus-camby-of-the-new-york-knicks-tries-to-score-as-jalen-news-photo/817482#marcus-camby-of-the-new-york-knicks-tries-to-score-as-jalen-rose-him-picture-id817482
Pacers vs Knicks game stats:
http://www.basketball-reference.com/boxscores/199906050NYK.html
Orlando Magic 1989/1998 black pinstripe jersey date should be 1989/1994
Here is prove:
http://www.sportslogos.net/logos/view/ywtq681agwnih5yh7uvsbwmf1/Orlando_Magic/1990/Road_Uniform
Please add to your website another/same Orlando Magic 1989/1998 black pinstripe jersey, but date should be 1994/1998
Here is prove:
http://www.sportslogos.net/logos/view/0jytsk0nnuhshfesqxh1r4ctp/Orlando_Magic/1995/Alternate_Uniform
Orlando Magic 1998/2003 white jersey date should be 1998/2000
Here is prove:
http://www.sportslogos.net/logos/view/oemtsrj5fvie3w45ph6nwm77e/Orlando_Magic/1999/Home_Uniform
Orlando Magic 1998/2003 blue jersey date should be 1998/2000
Here is prove:
http://www.sportslogos.net/logos/view/xh3y2ifufy3bdgxehjtfmhn0z/Orlando_Magic/1999/Road_Uniform
Please add to your website another/same Orlando Magic 1998/2003 white jersey, but date should be 2000/2003
Here is prove:
http://www.sportslogos.net/logos/view/h5bys2pwf4g3va6m8qexqucyb/Orlando_Magic/2001/Home_Uniform
Please add to your website another/same Orlando Magic 1998/2003 blue jersey, but date should be 2000/2003
Here is prove:
http://www.sportslogos.net/logos/view/6fqfcz8gftqgf4driumwh8xtv/Orlando_Magic/2001/Road_Uniform
Philadelphia 76ers 2000/2007 blue jersey date should be 2000/2006
Here is prove, that 76ers played with this alternate blue jersey till the 2006:
https://www.gettyimages.com/event/philadelphia-76ers-v-milwaukee-bucks-55994078#allen-iverson-of-the-philadelphia-76ers-drives-to-the-basket-against-picture-id56267063
76ers vs Bucks game stats:
https://www.basketball-reference.com/boxscores/200511230MIL.html
Washington Wizards 1997/2008 white jersey date should be 1997/2007
Here is prove:
http://www.sportslogos.net/logos/view/x2nccvm3h66bdpj124dgxkdcf/Washington_Wizards/1998/Home_Uniform
Washington Wizards 1997/2008 blue jersey date should be 1997/2007
Here is prove:
http://www.sportslogos.net/logos/view/gbr0isdq52u496ocsaefhwfo5/Washington_Wizards/1998/Road_Uniform
Washington Wizards 2008/2010 white jersey date should be 2007/2010
Here is prove:
http://www.sportslogos.net/logos/view/7mpigruedjbryfwre9qxlg45m/Washington_Wizards/2008/Home_Uniform
Washington Wizards 2008/2010 blue jersey date should be 2007/2010
Here is prove:
http://www.sportslogos.net/logos/view/wrxfvmd7l5jgjnwghg2tqfmxh/Washington_Wizards/2008/Road_Uniform
Dallas Mavericks 1993/2001 blue jersey date should be 1992/2001
Here is prove, that Mavericks started to playing with this away jersey from the 1992/93 season:
http://www.gettyimages.com/detail/news-photo/jim-jackson-of-the-dallas-mavericks-shoots-over-reggie-news-photo/494158521
Celtics vs Mavericks game stats:
http://www.basketball-reference.com/boxscores/199303260BOS.html
Dallas Mavericks 1992/1993 green jersey date should be 1991/1992
Here is prove that Mavericks played with this away jersey only in the 1991/92 season:
http://www.gettyimages.com/detail/news-photo/herb-williiams-of-the-dallas-mavericks-takes-a-jump-shot-news-photo/148080250
The Mavericks vs Bullets game stats:
http://www.basketball-reference.com/boxscores/199203050WSB.html
Dallas Mavericks 1986/1992 green jersey date should be 1986/1991
Golden State Warriors 1989/1997 white jersey date should be 1988/1997
Here is prove, that Warriors started to play with this home jersey in the 1988/89 season:
https://www.youtube.com/watch?v=m6qDOm7hEW4
Warriors vs Jazz game stats:
https://www.basketball-reference.com/boxscores/198905020GSW.html
Golden State Warriors 1989/1997 blue jersey date should be 1988/1997
Here is prove, that Warriors started to play with this blue jersey in the 1988/89 season:
https://www.youtube.com/watch?v=cahxrjT7N-I
Warriors vs Heat game stats:
https://www.basketball-reference.com/boxscores/198901300MIA.html
Golden State Warriors 1987/1989 white jersey date should be 1987/1988
Here is prove:
https://www.youtube.com/watch?v=FWTNNS_IwGA
Warriors vs Suns game stats:
https://www.basketball-reference.com/boxscores/198804080GSW.html
Golden State Warriors 1987/1989 blue jersey date should be 1987/1988
Golden State Warriors 1997/2002 white jersey date should be 1997/2001
Here is prove, that Warriors played with this home jersey till the 2000/01 season:
http://www.gettyimages.com/detail/news-photo/karl-malone-of-the-utah-jazz-leaps-for-the-basket-as-he-is-news-photo/656084
Warriors vs Jazz game stats:
http://www.basketball-reference.com/boxscores/200012290GSW.html
Golden State Warriors 1997/2002 blue jersey date should be 1997/2001
Here is prove, that Warriors played with this away jersey till the 2000/01 season:
http://www.gettyimages.com/detail/news-photo/derek-strong-of-the-los-angeles-clippers-waits-down-the-news-photo/650838#nov-2000-derek-strong-of-the-los-angeles-clippers-waits-down-the-picture-id650838
Warriors vs Clippers game stats:
http://www.basketball-reference.com/boxscores/200011290LAC.html
Golden State Warriors 2002/2010 white jersey date should be 2001/2010
Here is prove, that Warriors started to playing with this home jersey from the 2001/02 season:
http://www.gettyimages.com/detail/news-photo/guard-larry-hughes-of-the-golden-state-warriors-dribbles-news-photo/72307042
Warriors vs Rockets game stats:
http://www.basketball-reference.com/boxscores/200112280GSW.html
Golden State Warriors 2002/2010 blue jersey date should be 2001/2010
Here is prove, that Warriors started to playing with this away jersey from the 2001/02 season:
http://www.gettyimages.com/detail/news-photo/forward-antawn-jamison-of-the-golden-state-warriors-shoots-news-photo/506699#dec-2001-forward-antawn-jamison-of-the-golden-state-warriors-shoots-a-picture-id506699
Warriors vs Timberwolves game stats:
http://www.basketball-reference.com/boxscores/200112110MIN.html
Los Angeles Clippers 1987/2000 white jersey date should be 1987/1989
Here is prove:
http://www.sportslogos.net/logos/view/k2uv0htjj5tsjfa77hihb5aa1/Los_Angeles_Clippers/1988/Home_Uniform
Please add to your website another/same Los Angeles Clippers 1987/2000 white jersey, but date should be 1989/2000
Here is prove:
http://www.sportslogos.net/logos/view/f271nx306gaggjmkcfhisggwo/Los_Angeles_Clippers/1990/Home_Uniform
Los Angeles Clippers 2000/2010 blue jersey date should be 2002/2010
Here is prove:
http://www.sportslogos.net/logos/view/hrhevfjbmaxefse2sgjir0h8a/Los_Angeles_Clippers/2003/Alternate_Uniform
Los Angeles Lakers 1966/1972 yellow jersey date should be 1967/1972
Here is prove, that Lakers debut yellow and purple jersey uniforms in the 1967/68 season:
https://www.youtube.com/watch?v=kqjsHwEpwf0
Lakers vs Celtics game stats:
https://www.basketball-reference.com/boxscores/196805020LAL.html
Another prove:
https://en.wikipedia.org/wiki/1967–68_Los_Angeles_Lakers_season
Los Angeles Lakers 1966/1972 purple jersey date should be 1967/1972
Here is prove, that Lakers debut yellow and purple jersey uniforms in the 1967/68 season:
https://en.wikipedia.org/wiki/1967–68_Los_Angeles_Lakers_season
Los Angeles Lakers 1961/1966 white jersey date should be 1961/1967
Los Angeles Lakers 1961/1966 blue jersey date should be 1961/1967
Los Angeles Lakers 2001/2014 Sunday whites jersey date should be 2002/2014
Here is prove, that Lakers started to playing with this alternate white jersey from the 2002/03 season:
http://www.gettyimages.com/detail/news-photo/kobe-bryant-of-the-los-angeles-lakers-shoots-against-the-news-photo/1812948
Lakers vs Knicks game stats:
http://www.basketball-reference.com/boxscores/200302160LAL.html
2nd prove (take a look “notable occurrences” and you’ll see):
https://en.wikipedia.org/wiki/2002–03_NBA_season
3rd prove (check uniforms explaining and you’ll see):
https://en.wikipedia.org/wiki/Logos_and_uniforms_of_the_Los_Angeles_Lakers
Vancouver Grizzlies 1999/2000 black jersey date should be 1997/2000
Here is prove, that Grizzlies started to playing with this alternate black jersey from the 1997/98 season:
http://www.gettyimages.com/detail/news-photo/antonio-daniels-of-the-vancouver-grizzlies-moves-the-ball-news-photo/451317386
Grizzlies vs Rockets game stats:
http://www.basketball-reference.com/boxscores/199712160HOU.html
Minnesota Timberwolves 1998/2008 black jersey date should be 1997/2008
Here is prove, that Timberwolves started to playing with this alternate black jersey from the 1997/98 season:
http://www.gettyimages.com/detail/news-photo/eddie-johnson-of-the-houston-rockets-during-the-game-news-photo/470128585#eddie-johnson-of-the-houston-rockets-during-the-game-against-the-on-picture-id470128585
Timberwolves vs Rockets game stats:
http://www.basketball-reference.com/boxscores/199802260HOU.html
Seattle SuperSonics 2002/2001 red jersey date should be 1999/2001
Here is prove, that SuperSonics started to playing with this alternate red jersey from the 1999/00 season:
http://www.gettyimages.com/detail/news-photo/jason-kidd-of-the-phoenix-suns-and-gary-payton-of-the-news-photo/52165519
SuperSonics vs Suns game stats:
http://www.basketball-reference.com/boxscores/199911210PHO.html
Phoenix Suns 1992/2000 black jersey date should be 1994/2000
NBA alternate jerseys debuted in the 1994/1995 season.
Here is prove, that Suns started to playing with this alternate black jersey from the 1994/95 season:
http://www.gettyimages.com/detail/news-photo/dan-majerle-of-the-phoenix-suns-shoots-against-hakeem-news-photo/159975410#dan-majerle-of-the-phoenix-suns-shoots-against-hakeem-olajuwon-during-picture-id159975410
Suns vs Rockets game stats:
http://www.basketball-reference.com/boxscores/199505180HOU.html
Another prove:
http://www.nba.com/suns/suns-going-retro-black-uniforms
Portland Trail Blazers 2002/2011 red jersey date should be 2002/2012
Here is prove:
http://www.sportslogos.net/logos/view/rde6jtze045ucwfhxejj77h04/Portland_Trail_Blazers/2003/Alternate_Uniform
Sacramento Kings 1997/2001 purple jersey date should be 1998/2002
Here is prove:
http://www.sportslogos.net/logos/view/g8beypl60ledelp9bth9lxwne/Sacramento_Kings/1998/Alternate_Uniform
The Prove:
https://www.gettyimages.com/detail/news-photo/playoffs-utah-jazz-karl-malone-in-action-losing-ball-as-news-photo/81474681
Kings vs Jazz game stats:
https://www.basketball-reference.com/boxscores/199905080UTA.html
The Prove:
https://www.gettyimages.com/detail/news-photo/jason-williams-of-the-sacramento-kings-passes-over-his-head-news-photo/52372174
Kings vs Jazz game stats:
https://www.basketball-reference.com/boxscores/199905100UTA.html
The Prove:
https://www.gettyimages.com/detail/news-photo/forward-predrag-stojakovic-of-the-sacramento-kings-shoots-a-news-photo/624459
Kings vs Magic game stats:
https://www.basketball-reference.com/boxscores/200111090ORL.html