title: How to add a few minutes or days to the date and time String?
body: <p>Given that, i have a string like <code>String addTimestamp = 2021-05-01T00:00:00+02:00</code>, I wish to add a few minutes or days to his date.</p>
  <p>My current solution for adding 3 more days is:</p>
  <pre><code>ZonedDateTime result = ZonedDateTime.parse(addTimestamp, DateTimeFormatter.ISO_OFFSET_DATE_TIME);
  
  String removeTimestamp = result.plusDays(3).toString();
  System.out.println(&quot;addTimestamp:    &quot; + addTimestamp);
  System.out.println(&quot;removeTimestamp: &quot; + removeTimestamp);
  </code></pre>
  <p>This works well, but the it breaks the format:</p>
  <pre><code>addTimestamp:    2021-05-01T00:00:00+02:00
  removeTimestamp: 2021-05-04T00:00+02:00
  </code></pre>
  <p>As you see, the seconds in the <code>removeTimestamp</code> are missed. How can i fix it?</p>