diff --git a/src/main/java/gc/mda/signal_batch/domain/gis/service/GisServiceV2.java b/src/main/java/gc/mda/signal_batch/domain/gis/service/GisServiceV2.java
index ecefb2b..8036216 100644
--- a/src/main/java/gc/mda/signal_batch/domain/gis/service/GisServiceV2.java
+++ b/src/main/java/gc/mda/signal_batch/domain/gis/service/GisServiceV2.java
@@ -24,6 +24,7 @@ import org.springframework.stereotype.Service;
 import javax.sql.DataSource;
 import java.sql.ResultSet;
 import java.sql.SQLException;
+import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.util.*;
 import java.util.concurrent.ConcurrentHashMap;
@@ -327,7 +328,7 @@ public class GisServiceV2 {
 
         Set<String> requestedMmsis = new HashSet<>(request.getVessels());
 
-        // 1. 캐시에서 조회 (캐시된 날짜)
+        // 1. 캐시에서 조회 (캐시된 날짜) + 누락 MMSI 부분 DB fallback
         if (split.hasCachedData()) {
             List<CompactVesselTrack> cachedTracks =
                     dailyTrackCacheManager.getCachedTracksMultipleDays(split.getCachedDates());
@@ -343,6 +344,28 @@ public class GisServiceV2 {
             allTracks.addAll(filteredCached);
             log.debug("[CacheQuery] cached {} days -> {} tracks (filtered from {})",
                     split.getCachedDates().size(), filteredCached.size(), totalCachedCount);
+
+            // Daily 캐시에 없는 MMSI → DB fallback (hourly/5min 계층 조회)
+            Set<String> cachedMmsis = filteredCached.stream()
+                    .map(CompactVesselTrack::getVesselId)
+                    .collect(Collectors.toSet());
+            Set<String> missingMmsis = new HashSet<>(requestedMmsis);
+            missingMmsis.removeAll(cachedMmsis);
+            if (!missingMmsis.isEmpty()) {
+                LocalDate minDate = split.getCachedDates().stream().min(Comparator.naturalOrder()).orElse(null);
+                LocalDate maxDate = split.getCachedDates().stream().max(Comparator.naturalOrder()).orElse(null);
+                if (minDate != null) {
+                    LocalDateTime cacheStart = minDate.atStartOfDay().isBefore(startTime) ? startTime : minDate.atStartOfDay();
+                    LocalDateTime cacheEnd = maxDate.plusDays(1).atStartOfDay().isAfter(endTime) ? endTime : maxDate.plusDays(1).atStartOfDay();
+                    VesselTracksRequest fallbackReq = VesselTracksRequest.builder()
+                            .startTime(cacheStart).endTime(cacheEnd)
+                            .vessels(new ArrayList<>(missingMmsis)).build();
+                    List<CompactVesselTrack> dbResult = gisService.getVesselTracks(fallbackReq);
+                    allTracks.addAll(dbResult);
+                    log.info("[CACHE-MONITOR] queryWithCache daily PARTIAL → DB fallback: cacheHit={}, cacheMiss={}, dbTracks={}",
+                            cachedMmsis.size(), missingMmsis.size(), dbResult.size());
+                }
+            }
         }
 
         // 2. DB에서 조회 (캐시 미적중 과거 날짜)
diff --git a/src/main/java/gc/mda/signal_batch/global/util/DateTimeParseUtil.java b/src/main/java/gc/mda/signal_batch/global/util/DateTimeParseUtil.java
index d6648e1..525597d 100644
--- a/src/main/java/gc/mda/signal_batch/global/util/DateTimeParseUtil.java
+++ b/src/main/java/gc/mda/signal_batch/global/util/DateTimeParseUtil.java
@@ -1,6 +1,7 @@
 package gc.mda.signal_batch.global.util;
 
 import java.time.LocalDateTime;
+import java.time.ZoneId;
 import java.time.ZonedDateTime;
 import java.time.format.DateTimeFormatter;
 import java.time.format.DateTimeParseException;
@@ -76,11 +77,12 @@ public class DateTimeParseUtil {
         String trimmed = dateTimeString.trim();
 
         // Try zoned formatters first for Z or offset patterns
+        // UTC/Offset → 시스템 타임존(KST)으로 변환 후 LocalDateTime 추출
         if (trimmed.contains("Z") || trimmed.matches(".*[+-]\\d{2}:\\d{2}$")) {
             for (DateTimeFormatter formatter : ZONED_FORMATTERS) {
                 try {
                     ZonedDateTime zdt = ZonedDateTime.parse(trimmed, formatter);
-                    return zdt.toLocalDateTime();
+                    return zdt.withZoneSameInstant(ZoneId.systemDefault()).toLocalDateTime();
                 } catch (DateTimeParseException ignored) {
                     // Try next formatter
                 }