[Datepicker] offset -1

[rvoltolini]

Bug, feature request, or proposal:

Bug

What is the expected behavior?

Start Month at day 1

What is the current behavior?

Start Month at day 31 (offset -1), when i select the date at datepicker the date in input is updated correctly.
This error also happens when I select the month

What are the steps to reproduce?

Open Datepicker in https://material.angular.io/components/datepicker/overview

What is the use-case or motivation for changing an existing behavior?

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

OS Ubuntu 17.04 (update today)
Chrome/Firefox (update today)

Is there anything else we should know?

Last week I didn't have problems, I used a lot of times testing the system that I'm developing.
I updated the OS thinks this could be the problem, but I didn't get sucess

[julianobrasil]

@mmalerba, it seems to be related to that daylight saving time issue...

[mmalerba]

@julianobrasil have you had any luck reproducing? It looks normal for me

[rvoltolini]

I think not. Daylight in Brazil starts in october.
I opened Datepicker in other Pc and it worked normally.
I think it's something in my notebook but i don't know how discovery it.
I updated OS, deleted node_modules (including home folder), change angular/material version (beta 10 and 8) and the problem remained.

[julianobrasil]

@julianobrasil have you had any luck reproducing? It looks normal for me

@mmalerba, not really. I tried out with known past dst dates which I used as testing cases (and also tried a lot of other dates, over a decade), but with no luck.

It looks like a new issue, maybe caused by some particular configuration as @rvoltolini mentioned.

[jt-helsinki]

I think this is related to #7167

[mmalerba]

likely dupe of #7167

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