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This is the official anouncement of the Zamora province government for the year 2022. As you can see there, there are no bank holidays on June, so these 2 days mentioned in June, must be local bank holidays only in certain cities (I presume that they refer to the capital, also called Zamora).
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The official 2022 holiday lists for each local municipality can be found in the Official Bulletin for the province of Zamora (December 10, 2021, from page 7).
For the municipality of Zamora, both 6th and 29th of June are listed.