diff --git a/templates/user/import.tmpl b/templates/user/import.tmpl
index 3400e2f4..803a07c0 100644
--- a/templates/user/import.tmpl
+++ b/templates/user/import.tmpl
@@ -42,13 +42,16 @@
 				</select>
 			</label>
 			<script>
+				// timezone offset in seconds
+				const tzOffsetSec = new Date().getTimezoneOffset() * 60;
 				const fileInput = document.getElementById('fileInput');
 				const fileDates = document.getElementById('fileDates');
 				fileInput.addEventListener('change', (e) => {
 					const files = e.target.files;
 					let dateMap = {};
 					for (let file of files) {
-						dateMap[file.name] = file.lastModified / 1000;
+						// convert from milliseconds to seconds and adjust for tz
+						dateMap[file.name] = Math.round(file.lastModified / 1000) + tzOffsetSec;
 					}
 					fileDates.value = JSON.stringify(dateMap);
 				})