From b7663ff7e71262efc989534f9328747d889b94c8 Mon Sep 17 00:00:00 2001
From: looly <loolly@gmail.com>
Date: Mon, 6 Dec 2021 09:54:19 +0800
Subject: [PATCH] add method

---
 .../java/cn/hutool/core/date/DateTime.java    | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/hutool-core/src/main/java/cn/hutool/core/date/DateTime.java b/hutool-core/src/main/java/cn/hutool/core/date/DateTime.java
index bd0b2778a..4fa0d3e81 100644
--- a/hutool-core/src/main/java/cn/hutool/core/date/DateTime.java
+++ b/hutool-core/src/main/java/cn/hutool/core/date/DateTime.java
@@ -44,6 +44,11 @@ public class DateTime extends Date {
 	 */
 	private TimeZone timeZone;
 
+	/**
+	 * 第一周最少天数
+	 */
+	private int minimalDaysInFirstWeek;
+
 	/**
 	 * 转换时间戳为 DateTime
 	 *
@@ -670,6 +675,10 @@ public class DateTime extends Date {
 		final Calendar cal = (null != zone) ? Calendar.getInstance(zone, locale) : Calendar.getInstance(locale);
 		//noinspection MagicConstant
 		cal.setFirstDayOfWeek(firstDayOfWeek.getValue());
+		// issue#1988@Github
+		if (minimalDaysInFirstWeek > 0) {
+			cal.setMinimalDaysInFirstWeek(minimalDaysInFirstWeek);
+		}
 		cal.setTime(this);
 		return cal;
 	}
@@ -908,6 +917,18 @@ public class DateTime extends Date {
 		return this;
 	}
 
+	/**
+	 * 设置第一周最少天数
+	 *
+	 * @param minimalDaysInFirstWeek 第一周最少天数
+	 * @return this
+	 * @since 5.7.17
+	 */
+	public DateTime setMinimalDaysInFirstWeek(int minimalDaysInFirstWeek) {
+		this.minimalDaysInFirstWeek = minimalDaysInFirstWeek;
+		return this;
+	}
+
 	// -------------------------------------------------------------------- toString start
 
 	/**