Budget start/end date lacking the time information

[Platonn]

In #9333 we've just implemented the suggested solution https://github.com/SAP/spartacus/issues/9333#issuecomment-714799752 for date picker.

Decision:

• don't ask user for time
• default to midnight from user's timezone, if you can guess his timezone

My concerns:

• architecture: we've used converters layer to convert date vs datetime. Maybe we should have done it rather in the component (so the model that goes through the facade is original datetime)
• UX: currenlty we present budget dates as dates (in plain text as well as in date picker). But user has no notion about the actual time for the values. This is misleading, becuase my midnight 00:00 in my timezone is equal to UK's 23:00 the DAY BEFORE (so UK coworker has displayed different budget start day than me - in case when I set the value 00:00 in my timezone)

Suggestion:

1. architecture: let's do the conversion datetime<->date in the date picker component, instead of in converters
2. discuss with UX team, how we should present budget date in plain text (with time?) as well as in the date picker (i.e. with message underneath "the time will be set midnight of your timezone")

Note: only the architecture step (1.) (breaking change) suggested above will enable the UX improvement (2.) that can be postponed.

To be discussed. Then to prioritize properly.

[Platonn]

Simplicity of the date-picker component (to be almost-native datepicker) is important. It would be good not to pollute it with the date<->datetime conversion logic. We could try to convert it: a) in some other date-picker component (which would be more smart: able to convert date<->datetime and show some UX message like "the time will be set midnight of your timezone") b) in budget form component (to be checked: does current generic MyCompany architecture allows for custom conversions around forms?)