diff --git a/boot/common-framework/src/main/java/com/klaro/acquirecore/framework/util/DateUtil.java b/boot/common-framework/src/main/java/com/klaro/acquirecore/framework/util/DateUtil.java
new file mode 100644
index 0000000..7dd1607
--- /dev/null
+++ b/boot/common-framework/src/main/java/com/klaro/acquirecore/framework/util/DateUtil.java
@@ -0,0 +1,311 @@
+package com.klaro.acquirecore.framework.util;
+
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+import java.time.format.DateTimeParseException;
+import java.time.temporal.ChronoUnit;
+import java.util.Objects;
+
+/**
+ * Static utility class for date operations migrated from legacy/util_date.c
+ * Uses java.time.LocalDate and java.time.LocalDateTime for date handling.
+ */
+public final class DateUtil {
+
+    public static final String DEFAULT_DATE_FORMAT = "yyyy-MM-dd";
+    public static final String DEFAULT_DATETIME_FORMAT = "yyyy-MM-dd HH:mm:ss";
+    public static final String KOREAN_DATE_FORMAT = "yyyy년 MM월 dd일";
+    public static final String ISO_DATE_FORMAT = "yyyy-MM-dd'T'HH:mm:ss";
+
+    private static final DateTimeFormatter DATE_FORMATTER = DateTimeFormatter.ofPattern(DEFAULT_DATE_FORMAT);
+    private static final DateTimeFormatter DATETIME_FORMATTER = DateTimeFormatter.ofPattern(DEFAULT_DATETIME_FORMAT);
+    private static final DateTimeFormatter KOREAN_FORMATTER = DateTimeFormatter.ofPattern(KOREAN_DATE_FORMAT);
+    private static final DateTimeFormatter ISO_FORMATTER = DateTimeFormatter.ofPattern(ISO_DATE_FORMAT);
+
+    private DateUtil() {
+        throw new UnsupportedOperationException("Utility class cannot be instantiated");
+    }
+
+    /**
+     * Parses a date string using the default format (yyyy-MM-dd).
+     *
+     * @param dateStr the date string to parse
+     * @return the parsed LocalDate
+     * @throws DateTimeParseException if the string cannot be parsed
+     */
+    public static LocalDate parseDate(String dateStr) {
+        Objects.requireNonNull(dateStr, "dateStr must not be null");
+        return LocalDate.parse(dateStr, DATE_FORMATTER);
+    }
+
+    /**
+     * Parses a date string using the specified format pattern.
+     *
+     * @param dateStr the date string to parse
+     * @param pattern the date format pattern
+     * @return the parsed LocalDate
+     * @throws DateTimeParseException if the string cannot be parsed
+     */
+    public static LocalDate parseDate(String dateStr, String pattern) {
+        Objects.requireNonNull(dateStr, "dateStr must not be null");
+        Objects.requireNonNull(pattern, "pattern must not be null");
+        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(pattern);
+        return LocalDate.parse(dateStr, formatter);
+    }
+
+    /**
+     * Parses a datetime string using the default format (yyyy-MM-dd HH:mm:ss).
+     *
+     * @param dateTimeStr the datetime string to parse
+     * @return the parsed LocalDateTime
+     * @throws DateTimeParseException if the string cannot be parsed
+     */
+    public static LocalDateTime parseDateTime(String dateTimeStr) {
+        Objects.requireNonNull(dateTimeStr, "dateTimeStr must not be null");
+        return LocalDateTime.parse(dateTimeStr, DATETIME_FORMATTER);
+    }
+
+    /**
+     * Parses a datetime string using the specified format pattern.
+     *
+     * @param dateTimeStr the datetime string to parse
+     * @param pattern the datetime format pattern
+     * @return the parsed LocalDateTime
+     * @throws DateTimeParseException if the string cannot be parsed
+     */
+    public static LocalDateTime parseDateTime(String dateTimeStr, String pattern) {
+        Objects.requireNonNull(dateTimeStr, "dateTimeStr must not be null");
+        Objects.requireNonNull(pattern, "pattern must not be null");
+        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(pattern);
+        return LocalDateTime.parse(dateTimeStr, formatter);
+    }
+
+    /**
+     * Formats a LocalDate using the default format (yyyy-MM-dd).
+     *
+     * @param date the date to format
+     * @return the formatted date string
+     */
+    public static String formatDate(LocalDate date) {
+        Objects.requireNonNull(date, "date must not be null");
+        return date.format(DATE_FORMATTER);
+    }
+
+    /**
+     * Formats a LocalDate using the specified format pattern.
+     *
+     * @param date the date to format
+     * @param pattern the format pattern
+     * @return the formatted date string
+     */
+    public static String formatDate(LocalDate date, String pattern) {
+        Objects.requireNonNull(date, "date must not be null");
+        Objects.requireNonNull(pattern, "pattern must not be null");
+        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(pattern);
+        return date.format(formatter);
+    }
+
+    /**
+     * Formats a LocalDateTime using the default format (yyyy-MM-dd HH:mm:ss).
+     *
+     * @param dateTime the datetime to format
+     * @return the formatted datetime string
+     */
+    public static String formatDateTime(LocalDateTime dateTime) {
+        Objects.requireNonNull(dateTime, "dateTime must not be null");
+        return dateTime.format(DATETIME_FORMATTER);
+    }
+
+    /**
+     * Formats a LocalDateTime using the specified format pattern.
+     *
+     * @param dateTime the datetime to format
+     * @param pattern the format pattern
+     * @return the formatted datetime string
+     */
+    public static String formatDateTime(LocalDateTime dateTime, String pattern) {
+        Objects.requireNonNull(dateTime, "dateTime must not be null");
+        Objects.requireNonNull(pattern, "pattern must not be null");
+        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(pattern);
+        return dateTime.format(formatter);
+    }
+
+    /**
+     * Formats a LocalDate in Korean date format (yyyy년 MM월 dd일).
+     *
+     * @param date the date to format
+     * @return the formatted Korean date string
+     */
+    public static String formatDateKorean(LocalDate date) {
+        Objects.requireNonNull(date, "date must not be null");
+        return date.format(KOREAN_FORMATTER);
+    }
+
+    /**
+     * Calculates the number of days between two dates.
+     *
+     * @param startDate the start date
+     * @param endDate the end date
+     * @return the number of days between the dates
+     */
+    public static long daysBetween(LocalDate startDate, LocalDate endDate) {
+        Objects.requireNonNull(startDate, "startDate must not be null");
+        Objects.requireNonNull(endDate, "endDate must not be null");
+        return ChronoUnit.DAYS.between(startDate, endDate);
+    }
+
+    /**
+     * Adds days to a date.
+     *
+     * @param date the base date
+     * @param days the number of days to add (can be negative)
+     * @return the resulting date
+     */
+    public static LocalDate addDays(LocalDate date, long days) {
+        Objects.requireNonNull(date, "date must not be null");
+        return date.plusDays(days);
+    }
+
+    /**
+     * Adds months to a date.
+     *
+     * @param date the base date
+     * @param months the number of months to add (can be negative)
+     * @return the resulting date
+     */
+    public static LocalDate addMonths(LocalDate date, long months) {
+        Objects.requireNonNull(date, "date must not be null");
+        return date.plusMonths(months);
+    }
+
+    /**
+     * Adds years to a date.
+     *
+     * @param date the base date
+     * @param years the number of years to add (can be negative)
+     * @return the resulting date
+     */
+    public static LocalDate addYears(LocalDate date, long years) {
+        Objects.requireNonNull(date, "date must not be null");
+        return date.plusYears(years);
+    }
+
+    /**
+     * Checks if a date is before another date.
+     *
+     * @param date the date to check
+     * @param dateToCompare the date to compare against
+     * @return true if date is before dateToCompare
+     */
+    public static boolean isBefore(LocalDate date, LocalDate dateToCompare) {
+        Objects.requireNonNull(date, "date must not be null");
+        Objects.requireNonNull(dateToCompare, "dateToCompare must not be null");
+        return date.isBefore(dateToCompare);
+    }
+
+    /**
+     * Checks if a date is after another date.
+     *
+     * @param date the date to check
+     * @param dateToCompare the date to compare against
+     * @return true if date is after dateToCompare
+     */
+    public static boolean isAfter(LocalDate date, LocalDate dateToCompare) {
+        Objects.requireNonNull(date, "date must not be null");
+        Objects.requireNonNull(dateToCompare, "dateToCompare must not be null");
+        return date.isAfter(dateToCompare);
+    }
+
+    /**
+     * Checks if a date is between two other dates (inclusive).
+     *
+     * @param date the date to check
+     * @param startDate the start of the range
+     * @param endDate the end of the range
+     * @return true if date is between startDate and endDate (inclusive)
+     */
+    public static boolean isBetween(LocalDate date, LocalDate startDate, LocalDate endDate) {
+        Objects.requireNonNull(date, "date must not be null");
+        Objects.requireNonNull(startDate, "startDate must not be null");
+        Objects.requireNonNull(endDate, "endDate must not be null");
+        return !date.isBefore(startDate) && !date.isAfter(endDate);
+    }
+
+    /**
+     * Gets the start of the day for a given date.
+     *
+     * @param date the date
+     * @return the start of the day as LocalDateTime (00:00:00)
+     */
+    public static LocalDateTime startOfDay(LocalDate date) {
+        Objects.requireNonNull(date, "date must not be null");
+        return date.atStartOfDay();
+    }
+
+    /**
+     * Gets the end of the day for a given date.
+     *
+     * @param date the date
+     * @return the end of the day as LocalDateTime (23:59:59.999999999)
+     */
+    public static LocalDateTime endOfDay(LocalDate date) {
+        Objects.requireNonNull(date, "date must not be null");
+        return date.atTime(23, 59, 59, 999999999);
+    }
+
+    /**
+     * Gets today's date.
+     *
+     * @return the current date
+     */
+    public static LocalDate today() {
+        return LocalDate.now();
+    }
+
+    /**
+     * Gets the current datetime.
+     *
+     * @return the current datetime
+     */
+    public static LocalDateTime now() {
+        return LocalDateTime.now();
+    }
+
+    /**
+     * Validates if a string is a valid date in the default format.
+     *
+     * @param dateStr the date string to validate
+     * @return true if valid, false otherwise
+     */
+    public static boolean isValidDate(String dateStr) {
+        if (dateStr == null || dateStr.isEmpty()) {
+            return false;
+        }
+        try {
+            parseDate(dateStr);
+            return true;
+        } catch (DateTimeParseException e) {
+            return false;
+        }
+    }
+
+    /**
+     * Validates if a string is a valid date in the specified format.
+     *
+     * @param dateStr the date string to validate
+     * @param pattern the expected format pattern
+     * @return true if valid, false otherwise
+     */
+    public static boolean isValidDate(String dateStr, String pattern) {
+        if (dateStr == null || dateStr.isEmpty() || pattern == null) {
+            return false;
+        }
+        try {
+            parseDate(dateStr, pattern);
+            return true;
+        } catch (DateTimeParseException e) {
+            return false;
+        }
+    }
+}