Moment Timezone handles DST rules for various time zones, so as long as you provide the correct time zone identifier ( userTimezone in your code), it will automatically handle the DST offset for you. You don't need to manually adjust for the DST offset. It operates with both Node.js and JavaScript, which is great as you do not have to learn several date/time libraries for front-end and back-end programming. This is because the amount of time in a day, month, or year is variable. Date math does not use a linear time scale, but rather increments or decrements the dates on the calendar. It is easy to use, well documented, and minified in size (20kb). In Moment.js time math assumes a linear time scale, just incrementing or decrementing the UTC-based timestamp by the amount of the time units provided. format("MM/DD/YYYY h:mm A"), the resulting formatted time will already include the DST offset if DST is in effect for that particular date and time in the user's time zone. Moment.js is one of the best date/time libraries. Therefore, when you format the time using. tz(userTimezone), you are converting that UTC time to the user's local time based on their time zone, including any DST adjustments if applicable. In your code snippet, when you call moment.utc("T16:35:21.453"), you are specifying a UTC time. You can also fork this sandbox and keep building it using our online. With CodeSandbox, you can easily learn how pablosirera has skilfully integrated different packages and frameworks to create a truly impressive web app. When you use the tz() function with Moment Timezone, it takes into account the time zone's DST rules and adjusts the time accordingly. Explore this online Format Date With Moment sandbox and experiment with it yourself using our interactive online playground. Moment Timezone does consider the DST (Daylight Saving Time) rules of the selected time zone and applies the appropriate DST offset to the formatted time.
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