Read on below to learn more about the makeup Timed Research event in Pokémon GO:
Ultra Unlock Dragon Week: Makeup Timed Research event
During this makeup event, all Trainers will be able to access new Timed Research. The rewards for this new Timed Research will be the same as those for the Dragon Week Timed Research, but the tasks will be slightly different. The other features of the Dragon Week event, such as the featured Pokémon appearing in the wild, will not be active during this event.
Thank you for your understanding, and we appreciate your continued passion for Pokémon GO!
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—The Pokémon GO team
Source: Official Pokémon GO blog