There an option named Use ISO8601 standard in Date Picker in JIRA Administration > System > Look and Feel. Check the option and it will make Monday as the first day for date picker.
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I changed this setting and it had no impact in the next-gen project
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This setting "Use ISO8601 standard in Date Picker" seems to have no effect:
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Same problem here, no matter the ISO setting, calendar will start on Sunday.
It's quite annoying, my staff keeps scheduling tasks by mistake on Sunday, I would really appractiate a fix for this
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Go to
Turning it on will cause Monday to be the first day of week in the Date Picker, as specified by the ISO8601 standard
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Still not working. Any reason that this could not be taken into account? Maybe something else is overriding it...
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I believe Jira attempts to follow the locale, but I could not find verification of that.
I did find this support ticket that discusses how to change the calendar to a Monday start date. I suggest you test out on a test environment since the directions are not straight forward.
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