iCal | iCal-creator for PHP

I have a list like this:

I am using tapkey_management_api_v1 and I need to create a grant that has recurring events for each week days. but I got an error. Is it possible to add events for each day of week?

What is this about

I'm developing a web application in NodeJS to display information about the agenda of the users which are synchronized with the central server of my University. For that, I wrote a script that downloads an ICS file every hour to update my local agenda (stored in an SQLite database).

What seems to be the problem

Someone reported to me that some events in their agenda aren't synchronized properly with the University's version, the start time differs. Here's the problem. I have an Event A and an Event B which are both displayed as starting at 6am UTC on the university web page. But, when I retrieve them from the server in iCal format, they are represented as such (I've removed the properties unrelated to my issue) :

I have scraped data from a url using beautiful soup. But after cleaning there are a number of blankspaces/ whitespaces/newlines in the cleaned data. I tried .strip() function to remove those. But it is still present.

Code

I am using the nuget package Ical.Net 4.2.0 in my C# project. I've created a recurring calendar event and need to identify the start DateTime for each occurrence. I query the calendar with GetOccurrences() like this:

I'm trying to figure out how to take an icalendar file from AirBnB, iterate through the values and then insert those in our MySQL DB.

I'm able to parse the ical file with results using the PHP Class iCalEasyReader with the following results:

I'm trying to send .ics calendar invites through SendGrid (from Node server) so that it renders in clients like Outlook or Gmail as an actual invitation (with accept/decline buttons) and not just as an attachment file.

I've spent days researching this (dozens of Stackoverflow questions, RFC-5545, RFC-2446, iCalendar Specification Excerpts, Sendgrid's GitHub issues threads: 1, 2, 3, SendGrid docs, sources etc).

However, there just doesn't seem to be an answer for this (or am I missing something out?).

What I've found so far is that Content-Type for the attachment is very important here, especially, method=REQUEST part. And that even the order of properties in the file makes difference.

Despite a lot of questions here on SO, most of them remain unanswered for some reason.

Here's how I set up my attachment object:

I am having trouble trying to send an .ics file 'meeting invitation' via email.

I am using this class to quickly generate the contents of the .ics file: https://gist.github.com/jakebellacera/635416

The content generates correctly but I cannot get it to show as an attachment... so far only as string.

I have even tried to encode it but it just shows the encoded .ics content as a string.

Here is my code currently:

I have spent too many days & nights reading through documentation and trying just about anything to get this to work.

I have implemented this datetime picker for a website's contact form so users can make reservations and in turn the server will send an .ics calendar request to the owner for his records: https://mugifly.github.io/jquery-simple-datetimepicker/

The datetimepicker is configured via jquery.simple-dtpicker.js to have format: 'DD-MM-YYYY hh:mm' for both available languages, en & es for English and Spanish. The reason is the website is Spanish.

Up to here everything works great and I get a datetime value sent through when testing the contact form.

My issue is SIMPLY trying to add 1 hour to the obtained datetime in order to fulfill the required format for the .ics event in PHP.

Instead of adding an hour, it either defaults to the current local time and adds 1 hour or it defaults to 01/01/1970 (Epoch Time) and mangles the time. This is not the same outcome I get when succesfully testing the same code in online php testers.

Here is my php code: