Question: What is the start date of the series won by the NHL 's St. Louis Blues to end their drought ?

text: List of NHL franchise post-season droughts
Longest active droughts -- Post-season series win droughts
A post-season series win drought is continued either by not making the playoffs in a season or by making the playoffs in a season but subsequently lost the first round series . Since the first round of the NHL playoffs consist of 8 series ( 16 teams ) , there will be 23 teams in this list – the 15 teams that do not qualify for the post-season , plus the 8 teams that lose their first round series . The other 8 teams – the Boston Bruins , Carolina Hurricanes , Colorado Avalanche , Columbus Blue Jackets , Dallas Stars , New York Islanders , San Jose Sharks , and St. Louis Blues – all won a post-season series in the 2019 Stanley Cup playoffs .
This article is a list of the active and all-time National Hockey League (NHL) franchise post-season appearance, post-season series win, Stanley Cup Finals and Stanley Cup droughts up to and including the 2019 Stanley Cup playoffs. Those teams which have never made it in franchise history are listed by the season that they entered the league, either as a new franchise or when they merged into the NHL from the defunct World Hockey Association (WHA) league. Note: These lists do not include the cancelled 2004-05 NHL season. Among the current 31 NHL teams, 11 have never won the Stanley Cup. Additionally, one of the Original Six franchises - the Toronto Maple Leafs - has a Stanley Cup drought that includes the entire expansion era (51 seasons and counting). With the Vegas Golden Knights winning the Western Conference in 2018, there are only four franchises that have never reached the Stanley Cup Finals. Of those four, the oldest is the Arizona Coyotes (previously the Winnipeg Jets) (38 seasons), while the Maple Leafs have an even longer drought (51 seasons). The longest Stanley Cup championship drought in history was that of the New York Rangers, broken in 1994 after 53 seasons. The Maple Leafs have the current longest active Stanley Cup championship drought at 51 seasons and counting. In 2010, the Chicago Blackhawks ended what was the second-longest ever Stanley Cup championship drought at 47 seasons (now the sixth-longest). The end of that drought was the first of three consecutive years in which one of the eleven longest such droughts was broken (Chicago Blackhawks in 2010, Boston Bruins in 2011, and Los Angeles Kings in 2012). The Florida Panthers have the longest active win drought (22 seasons).
Team Last post-season series win Subsequent post-season series losses Postseason series win drought
Florida Panthers 1995-96 4 : 1996-97 , 1999-2000 , 2011-12 , 2015-16 22 seasons
Toronto Maple Leafs 2003-04 4 : 2012-13 , 2016-17 , 2017-18 , 2018-19 14 seasons
Buffalo Sabres 2006-07 2 : 2009-10 , 2010-11 0 12 seasons
Vancouver Canucks 2010-11 3 : 2011-12 , 2012-13 , 2014-15 0 8 seasons
Arizona Coyotes 2011-12  0 7 seasons
New Jersey Devils 2011-12 1 : 2017-18 0 7 seasons
Philadelphia Flyers 2011-12 3 : 2013-14 , 2015-16 , 2017-18 0 7 seasons
Detroit Red Wings 2012-13 3 : 2013-14 , 2014-15 , 2015-16 0 6 seasons
Los Angeles Kings 2013-14 2 : 2015-16 , 2017-18 0 5 seasons
Calgary Flames 2014-15 2 : 2016-17 , 2018-19 0 4 seasons
Chicago Blackhawks 2014-15 2 : 2015-16 , 2016-17 0 4 seasons
Minnesota Wild 2014-15 3 : 2015-16 , 2016-17 , 2017-18 0 4 seasons
Montreal Canadiens 2014-15 1 : 2016-17 0 4 seasons
Anaheim Ducks 2016-17 1 : 2017-18 0 2 seasons
Edmonton Oilers 2016-17  0 2 seasons
New York Rangers 2016-17  0 2 seasons
Ottawa Senators 2016-17  0 2 seasons
Nashville Predators 2017-18 1 : 2018-19 0 1 season
Pittsburgh Penguins 2017-18 1 : 2018-19 0 1 season
Tampa Bay Lightning 2017-18 1 : 2018-19 0 1 season