title: day incorrect in angular material datepicker
body: <p>When I select a date I see the correct date in the field but, when I save, the datepicker send the day before the date I have selected ( 3 hours offset )
  i am using angular reactive form and MatMomentDateModule for date picker .</p>
  
  <p>the problem is related to timezones but i just want to save the same date that the user enter to database .</p>
  
  <p>Code repreduced here : <a href="https://stackblitz.com/edit/angular-material-moment-adapter-example-kdk9nk?file=app%2Fapp.module.ts" rel="noreferrer">https://stackblitz.com/edit/angular-material-moment-adapter-example-kdk9nk?file=app%2Fapp.module.ts</a></p>
  
  <p><a href="https://i.stack.imgur.com/3YloV.png" rel="noreferrer"><img src="https://i.stack.imgur.com/3YloV.png" alt="issue on stackblitz"></a></p>
  
  <p>issue related to this on githup :</p>
  
  <p><a href="https://github.com/angular/material2/issues/7167" rel="noreferrer">https://github.com/angular/material2/issues/7167</a></p>
  
  <p>Any help is appreciated , and i think a lot of developers need a solution for this .</p>