I can confirm that tests are failing in a locale affected by daylight savings (I'm inAmerica/Vancouver). I found out because tests stared breaking locally, and I made some experiments showing output different from Moment:https://runkit.com/lucasrcosta/5feca83aea7c09001b879b3a ...
During days with daylight savings time, the addition of an extra day is not effective when the hour is in question. Presently, I have the following code, which functions properly except when dealing with days that observe Daylight Savings Time...""". Table of contents Adjustment in Moment.js...