function getMonthName(monthNumber) {
  const date = new Date();
  date.setMonth(monthNumber - 1);

  return date.toLocaleString([], { month: 'long' });
}

The current day of month will have an impact on the behavior of this method. Conceptually it will add the number of days given by the current day of the month to the 1st day of the new month specified as the parameter, to return the new date. For example, if the current value is 31st January 2016, calling setMonth with a value of 1 will return 2nd March 2016. This is because in 2016 February had 29 days.

  • railsdev@programming.dev
    0·
    1 year ago

    In Ruby (with ActiveSupport) I would do something like 4.days.from_now or 30.days.from_now.

    If I really needed “one month from now” on some specific day of the month that not every month has I’d do:

    def 31st_of_next_month
  next_month = (Time.current.end_of_month + 1.day).beginning_of_month
  day = next_month + 31.days
  return day if day.month == next_month

  # last day of month if no 31st
  next_month.end_of_month.beginning_of_day
end

    Disclaimer: I’m laying in bed typing this on mobile. The code probably sucks but I’m writing for illustrative purposes.