Use the greater than (>) and less than (<) operators to check if date is between dateStart and dateEnd.
Time & Date
Here is a vanilla JS alternative to the moment.js timeFromNow() method.
Set an alarm that will play any sound from your computer. You can even select a snooze time after it sounds. Awesome!
This script displays a calendar page of the chosen month and year. The function takes a date object as its parameter. If it is omitted, the calendar will default to the date on the client computer.
This script generates code for an event calendar instead of having to do the tedious task of making one each month. This completely simplifies the table making involved. Just punch in your data and cut and paste the code.