Pokémon League season dates

Does anyone know the date ranges of the Pokémon League seasons? On Bulbapedia there is the Pokémon League page, which mentions all the participation prices of each year and season. However, I have been unable to find the date-ranges for these seasons.

For example: for 2016-2017 it mentions:

But does anyone has any source from when to when (in terms of dates) the “Boulder Season” was?

You’d think information like this is easily available, but I’ve looked for this information in the past when I made my English ‘Pikachu around the World’ collection post, and also did a quick google search earlier today after @mitchandrsn asked me this same question. I’ve been unable to find any website that mentions the dates of the different Pokémon League seasons, or simply an announcement posted in 2016 for the “Boulder Season” that might mention the date-range.

Any help is appreciated.



You may be able to use the wayback machine to check the Pokemon website for a tournament schedule. That helped me a lot when looking into the gen 3 stamped cards

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2016 - 2017
Nov - Boulder Cascade Thunder
Dec - Rainbow Soul Marsh
Jan - Volcano Earth Pikachu
Feb - Decidueye
Mar - Incineroar
Apr - Primarina
May - Ori Fire
Jun - Ori Electric
Jul - Ori Psychic
Aug - Darkrai
Sept - Diancie
Oct - ?

Source - my east cost US based ex league leader mother’s unbelievably meticulous records. It’s possible some leagues received and distributed these promos out of order. League product distribution logistics were not good back then, and stuff often showed up months behind schedule.


I still actively participate in league and play the TCG still. I believe the league seasons’ bookend dates would coincide with the first and last day of that years competitive TCG standard format season, also know as “standard rotation”.

For example:

2011-12 Modified format (TCG) - July 1, 2011 to August 31, 2012

2012-13 Modified format (TCG) - September 1, 2012 to August 27, 2013

2013-14 Modified format (TCG) - August 28, 2013 to September 2, 2014

2014-15 Modified format (TCG) - September 3, 2014 to September 1, 2015

2015-16 Standard format (TCG) - September 2, 2015 to September 1, 2016

2016-17 Standard format (TCG) - September 2, 2016 to September 1, 2017

2017-18 Standard format (TCG) - September 2, 2017 to August 28, 2018

2018-19 Standard format (TCG) - August 28, 2018 to August 15, 2019

2019-20 Standard format (TCG) - August 15, 2019 to August 28, 2020

2020-21 Standard format (TCG) - August 28, 2020 - September 10, 2021

Source is Bulbapedia for the dates.

Nope, the Standard format dates is something different as the league cycles.
Standard format is adjusted each year after worlds. (aug/sep)

And I remember the Boulder season was indeed Januari