Is there a scheduling library?

Question

JavaScript

Task: A person registers and draws up his work schedule (Monday from 8 to 6, Tuesday from 8 to 10, from 12 to 6, etc.)
Tell me a ready-made scheduling tool, or tell me your suggestions on how to organize it.
Conditions, the schedule is constant for a week, a person himself chooses the time for each day, when he works, when he does not work, he can work at least an hour a day, rest an hour later

Answer 1

And if you match only the names (A, B, No. 10.1), but with the condition that there is a space on the left, and it is optional on the right. comma + space? not strict enough?

str
  .replace(/(\s)([А-Я])([\s|,])/g, '$1<a href="$2">$2</a>$3')
  .replace(/(\s)(№)(\d+(?:\.\d+)?)([\s|,])/g, '$1<a href="$3">$2$3</a>$4');

Answer 2

Trello
Google Tasks
Google Calendar
MS Excel
15+ Resources for Planning and Time Management
The 3 best free services to organize your...

Answer 3

https://developers.google.com/sheets/api/quickstart/php