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Angular UTC Date is showing one day after

I am storing date and time separately from Angular to C#. While storing in database, I combine start date and start time field in C# and store it in dAtabase UTC like this: "2020-02-28T22:30:30Z".
While returning from c#, i create a new DateTime with start date and start time and return as one variable. However, if the date is 28/02/2020 and time is 4.00 am, with timezoneoffset of 5.30 India, the date gets rendered to 29/02/2020 4.00 am.
Is it possible to get date and time in Angular and render it separately as string etc.
Thanks

In JavaScript Date is a timestamp, counts the number of miliseconds since January 1, 1970 00:00 UTC. So you might be having a problem with timezones. Check this answer I gave a couple of weeks ago, it may guide you. I also add a function to solve it and some references there, Subtract day in conversion between Moment and LocalDate.

angular set timezone based on user browser timezone so you can change datetimes to another timezone. please read it How to convert Date in angular to another time zone

How can I determine the last day of the month [duplicate]

This question already has answers here:
Last day of the month in .NET
(5 answers)
Closed 7 years ago.
How can I determine the last day of the month, for the tested month, when the user enters a date into textbox that is further from the available last day for that month? Also how do I feed that back to the user.
When the user enters the date, for example, of April 31, 2015, the date should automatically change to April 30, 2015.
I would like to try doing this using c#

3rd EDIT: The below will get you close to what you're asking for but really just make use of a datepicker control it will help prevent the majority of invalid dates and save you a good amount of development time
2nd EDIT: So TryParse is beneficial because if the date is valid, continue and your done. If you have an invalid date, which TryParse will tell you, then you can compare the value that was input for the day value and see how close it is to the end of the month, i.e. take 31 - 30 = 1, 1 number off so they probably meant 30
EDIT: To answer your question about finding an invalid date check this out: Validate a DateTime in C#
It shows how to detect an invalid date.
To answer your question about how to "guess" which validate date they are closest to I'd say it depends on how you have your date entered. If you do something like have them enter an int value for the day value I'd check to see what the highest day value is for the selected month and then see which one they are closest to (this is just a math operation at this point).
I think this will work
DateTime lastday = new DateTime(DateTime.Today.Year, DateTime.Today.Month, DateTime.DaysInMonth(DateTime.Today.Year, DateTime.Today.Month));

This is an easy way:
//first day of next month
var dt = new DateTime(2015,4,1);
var lastDayOfMonth = dt.AddDays(-1).Day;
As far as delivering a message back to the user, it depends on the environment, technology and preferred approach.

Get full date when DateTime.DayOfYear and Year is given

Is there a possibility to get the full date out of the year and the dayOfYear value?
For example: today is Thursday, 19th of february 2015.
The dayOfYear-Value of today is 50.
If I have the value 75 and the year 2010, how am I able to get the matching date?
It could be displayed in a textBox, dateTimePicker, whatever.
But you only have the information year & dayOfYear.
Thanks

You can use the following code:
DateTime day = New DateTime(2010, 1, 1).AddDays(75 - 1);
First get the first day of the year, then add necessary day count minus one (you are already on the first date of the year) days to the first day and you are there.

Create a date time with month and day only, no year

I am creating a timer job in VS for sharepoint, and I want to create a Date object that only has a month and day. The reason for this is because I want this job to run annually on the specific date.
If it's not possible with a date object, then how would you go about doing this?
Here's what I've got:
DateTime value = new DateTime(2010, 1, 18);

Well, you can create your own type - but a DateTime always has a full date and time. You can't even have "just a date" using DateTime - the closest you can come is to have a DateTime at midnight.
You could always ignore the year though - or take the current year:
// Consider whether you want DateTime.UtcNow.Year instead
DateTime value = new DateTime(DateTime.Now.Year, month, day);
To create your own type, you could always just embed a DateTime within a struct, and proxy on calls like AddDays etc:
public struct MonthDay : IEquatable<MonthDay>
{
private readonly DateTime dateTime;
public MonthDay(int month, int day)
{
dateTime = new DateTime(2000, month, day);
}
public MonthDay AddDays(int days)
{
DateTime added = dateTime.AddDays(days);
return new MonthDay(added.Month, added.Day);
}
// TODO: Implement interfaces, equality etc
}
Note that the year you choose affects the behaviour of the type - should Feb 29th be a valid month/day value or not? It depends on the year...
Personally I don't think I would create a type for this - instead I'd have a method to return "the next time the program should be run".

How about creating a timer with the next date?
In your timer callback you create the timer for the following year? DateTime has always a year value. What you want to express is a recurring time specification. This is another type which you would need to create.
DateTime is always represents a specific date and time but not a recurring date.

There is no such thing like a DateTime without a year!
From what I gather your design is a bit strange:
I would recommend storing a "start" (DateTime including year for the FIRST occurence) and a value which designates how to calculate the next event... this could be for example a TimeSpan or some custom structure esp. since "every year" can mean that the event occurs on a specific date and would not automatically be the same as saysing that it occurs in +365 days.
After the event occurs you calculate the next and store that etc.

Anyway you need 'Year'.
In some engineering fields, you have fixed day and month and year can be variable. But that day and month are important for beginning calculation without considering which year you are. Your user, for example, only should select a day and a month and providing year is up to you.
You can create a custom combobox using this: Customizable ComboBox Drop-Down.
1- In VS create a user control.
2- See the code in the link above for impelemnting that control.
3- Create another user control and place in it 31 button or label and above them place a label to show months.
4- Place the control in step 3 in your custom combobox.
5- Place the control in setp 4 in step 1.
You now have a control with only days and months. You can use any year that you have in your database or ....

Building a Datetime Object for SQL database insert

I'm working on a small web form that requires the user to input (among other things), the scheduled backup time of whatever server they're adding to the system. The problem is, I'm struggling to find out the best way to take the user input and build a DateTime object (which is what the database requires).
I only really care about the Day of Week, Time of Day (12 or 24 hour clock).
I thought about just creating an empty DateTime object and then just adding my input values from the user, but you can only get, not set, the day of week, time of day, etc.
I've been looking at the Calender asp control, which would work for the day of the week selection, but I can't seem to find any support of time of day.
Thanks.

I don't think you want to use a DateTime for a recurring event such as a backup. A DateTime is useful for storing a particular date and time, but not a "template" for a recurring event. Instead I'd use separate columns to store the day of week value (0-6) and time of date (minutes after midnight) for the event.

If you going to use datepicker here is one great sample for adding JQuery date picker using C#. That helped me including in my project evrn if I did know anything abaut JQuery and java sripts at all.

DateTime is a immutable value type. You cannot set anything on it.
Assumed that you stick with DateTime on the DB and you don't want to use a DateTimePicker control.
You have to specify how the day of week and the time should be represented in the DateTime. You can start with DateTime.MinValue, the 1.1.0001, 12:00 at midnight, and add the day of week and the time. unfortunately, a regular DateTime field in a SqlServer 2005 is not able to store this date. So lets move it to the year 2000. The 1.1.2000 was a Saturday. You could calculate the DateTime like this:
int dayOfWeek; // 0 = mon, 6 = son
DateTime time;
DateTime scheduleTime = new DateTime(2000, 1, (dayOfWeek + 2) % 6 + 1)
+ time.TimeOfDay;
But honestly, I wouldn't do it. It smells. I just answered your question. Listen to tvanfosson. He said everything that needs to be said.