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julianobrasil
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@julianobrasil julianobrasil commented Feb 21, 2018

It looks like javascript messes things up when trying to apply DST rules to format some past dates during the Date-to-string conversions. The issue pops up when the past dates don't follow today's DST rules for a given locale (usually as a result of each local government decisions).

@googlebot googlebot added the cla: yes PR author has agreed to Google's Contributor License Agreement label Feb 21, 2018
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Looks good to me, I just want to do some manual testing before approving

* very frequently, and the current valid rule is not always valid in previous years though.
* We work around this problem building a new Date object which has its internal UTC
* representation with the local date and time.
* @param dtf Intl.DateTimeFormat object, containg the desired string format
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Add a note that dtf must have its timeZone set to 'utc' for this method to work properly

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Ok I tested Linux, Mac, and IE attempted to reproduce the issue described in #7167 (comment) and it seemed to work fine on all browser & OS's that I tested. So looks good

@mmalerba mmalerba added pr: lgtm action: merge The PR is ready for merge by the caretaker target: patch This PR is targeted for the next patch release labels Feb 21, 2018
@jelbourn jelbourn merged commit 2fad732 into angular:master Feb 26, 2018
@julianobrasil julianobrasil deleted the fixNativeDateAdapter branch February 26, 2018 15:26
mmalerba pushed a commit to mmalerba/components that referenced this pull request Feb 26, 2018
jelbourn pushed a commit to jelbourn/components that referenced this pull request Feb 27, 2018
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Datepicker: Year selection mode doesn't work with years before 1986 Datepicker Issue - Calendar is wrong & picks the wrong day
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