From ee59394542728ffa27fdec6417439809a8697678 Mon Sep 17 00:00:00 2001
From: hazptr <36674601+hazptr@users.noreply.github.com>
Date: Mon, 12 Oct 2026 18:22:56 +0600
Subject: [PATCH] Fix tracker start date being shifted by the UTC offset
 (#4049)

Closes #1340
Closes #4049
---
 CHANGELOG.md                                               | 1 +
 .../java/eu/kanade/domain/track/interactor/AddTracks.kt    | 7 +------
 2 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8abef8c49..2b6f22496 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -40,6 +40,7 @@ The format is a modified version of [Keep a Changelog](https://keepachangelog.co
 - Fixed updating from v0.20.x failing when the database had duplicate history or tracking entries, or damaged indexes ([@AntsyLich](https://github.com/AntsyLich))
 - Fixed a crash when a back gesture was still in progress as the reader or a dialog closed ([@AntsyLich](https://github.com/AntsyLich))
 - Fixed Kitsu login and other requests that send data failing with "Failed to bypass Cloudflare" ([@AntsyLich](https://github.com/AntsyLich))
+- Fixed tracker start date being off by a day when adding tracking to an entry with read history in some timezones ([@hazptr](https://github.com/hazptr)) ([#4049](https://github.com/mihonapp/mihon/pull/4049))
 
 ## [v0.21.1] - 2026-10-12
 ### Fixed
diff --git a/app/src/main/java/eu/kanade/domain/track/interactor/AddTracks.kt b/app/src/main/java/eu/kanade/domain/track/interactor/AddTracks.kt
index 010e6522c..c14d2d434 100644
--- a/app/src/main/java/eu/kanade/domain/track/interactor/AddTracks.kt
+++ b/app/src/main/java/eu/kanade/domain/track/interactor/AddTracks.kt
@@ -8,10 +8,8 @@ import eu.kanade.tachiyomi.data.track.EnhancedTracker
 import eu.kanade.tachiyomi.data.track.Tracker
 import eu.kanade.tachiyomi.data.track.TrackerManager
 import eu.kanade.tachiyomi.source.Source
-import eu.kanade.tachiyomi.util.lang.convertEpochMillisZone
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
-import kotlinx.datetime.TimeZone
 import logcat.LogPriority
 import tachiyomi.core.common.util.system.logcat
 import tachiyomi.domain.chapter.interactor.GetChaptersByMangaId
@@ -61,10 +59,7 @@ class AddTracks(
                     .minOrNull()
 
                 firstReadChapterDate?.let {
-                    val startDate = firstReadChapterDate.toEpochMilliseconds().convertEpochMillisZone(
-                        TimeZone.currentSystemDefault(),
-                        TimeZone.UTC,
-                    )
+                    val startDate = firstReadChapterDate.toEpochMilliseconds()
                     track = track.copy(
                         startDate = Instant.fromEpochMilliseconds(startDate),
                     )