Best way to replace the time portion of date time for posting half day leave

[kflow12]

Hi

My leave flow was working well but then I added the add event to group calendar and realised that all the dates have a time portion set to midnight and it would be really confusing for users to have to set date time to show in the calendar correctly. 

1) the time portion is default to midnight so a user who is taking 1 days leave cannot book from 03 june 2022 00:00:00 to 03 june 2022 00:00:00 this gives an error in the calendar. 

2) a person booking less than 1 day would need to set date and time. Although that is possible it makes it more likely that users taking a full day leave will fill the form in incorrectly.

To solve the same date and time issue I changed the calendar to read first day on leave and back at work on instead of last day on leave.

I split the flow on condition for leave days less than 1 so that I could assign the half day leave as out of office from a set time to another. I have added 2 column choices for times (start and end) now I need to replace the midnight in the date time with these times.

How can I replace the midnight portion of the start and end date easily with new times? I thought a replace expression might work but it says the start is an object.

[Rhiassuring]

Hi there, 

I searched around the community to see if I could find something just like your situation - and I did! Take a look at this and let me know if it helps you out:

https://powerusers.microsoft.com/t5/Building-Flows/create-calender-item/td-p/79363

Cheers,

Rhia

[kflow12]

Hi Rhia

Thanks for the response. The user in that thread has only considered full day leave. I have already solved the full day leave by using back at work on and using the time conversion action so that the lists, mails and calendar events are all in right time format. My main problem is that the half day leave needs to show correct times as it does not use the same settings in calendar as full day leave. Half day leave must book out times selected with calendar settings showing out of office between those times. I thought since midnight is preset its would be easy to replace the midnight with the times the user selected. I am getting an error on using the replace expression directly as it sees it as an object. I am not sure how to convert the first day on leave to a string so that I can replace the time with the users selection.