title: Do I need to deal with Timezone and Daylight Saving conversions for an international hairdressing web app calendar?
body: <p>I have to create a reservation calendar that can be used by different hairdressers in different countries.</p>
  
  <p>In my case, the user browser could be in any localization/timezone, my server is in EST and my SQL is also located in a different timezone. My app is basically in Angular 6 + Netcore 3.0 and SQL DB.</p>
  
  <p>In my calendar, you can create an event adding 30 minutes, so you can book for example from 2 pm to 4:30 pm, 5 pm or 5:30 pm ..and so on.
  Each calendar is associated with a physical hairdressing place, Could it be better to work with Date(year, month, day), and hours and minutes separately and avoid time conversions?</p>
  
  <p>If there is hairdressing in Madrid, for every part of the world I have to show the same calendar. If the hairdressing opens at 9 am in Madrid, I have to show it to any user in the world at 9 am (Madrid time).</p>
  
  <p>Also, Daylight Saving is meaningless because every event will be fixed in date + hour + minutes...</p>