From 60af11ef7304ce96795aa5dd20f32c55b217a94d Mon Sep 17 00:00:00 2001
From: Felix <23635466+its-felix@users.noreply.github.com>
Date: Wed, 20 Nov 2024 04:18:51 +0100
Subject: [PATCH] fix NewLocalDate

---
 go/common/xtime/localdate.go      | 5 +++--
 go/common/xtime/localdate_test.go | 4 ++++
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/go/common/xtime/localdate.go b/go/common/xtime/localdate.go
index 8dcdda4..51f03bd 100644
--- a/go/common/xtime/localdate.go
+++ b/go/common/xtime/localdate.go
@@ -11,7 +11,7 @@ type LocalDate int64
 
 func NewLocalDate(t time.Time) LocalDate {
 	year1 := 1970
-	year2 := t.Year() - 1 // exclude the current year for leap year calculations
+	year2 := t.Year()
 	mul := 1
 
 	if year1 > year2 {
@@ -19,7 +19,8 @@ func NewLocalDate(t time.Time) LocalDate {
 		mul = -1
 	}
 
-	totalYears := year2 - year1 + 1
+	totalYears := year2 - year1
+	year2 -= 1 // exclude the current year for leap year calculations
 	leapYears1 := year1/4 - year1/100 + year1/400
 	leapYears2 := year2/4 - year2/100 + year2/400
 	leapYears := leapYears2 - leapYears1
diff --git a/go/common/xtime/localdate_test.go b/go/common/xtime/localdate_test.go
index fe2708f..a02a9e0 100644
--- a/go/common/xtime/localdate_test.go
+++ b/go/common/xtime/localdate_test.go
@@ -11,6 +11,10 @@ func TestNewLocalDate(t *testing.T) {
 	assert.Equal(t, LocalDate(0), NewLocalDate(time.Date(1970, time.January, 1, 0, 0, 0, 0, time.FixedZone("", -60*60*14))))
 	assert.Equal(t, LocalDate(0), NewLocalDate(time.Date(1970, time.January, 1, 0, 0, 0, 0, time.UTC)))
 	assert.Equal(t, LocalDate(0), NewLocalDate(time.Date(1970, time.January, 1, 23, 59, 59, 0, time.FixedZone("", 60*60*14))))
+
+	assert.Equal(t, LocalDate(-365), NewLocalDate(time.Date(1969, time.January, 1, 0, 0, 0, 0, time.UTC)))
+	assert.Equal(t, LocalDate(365), NewLocalDate(time.Date(1971, time.January, 1, 0, 0, 0, 0, time.UTC)))
+	assert.Equal(t, LocalDate(165), NewLocalDate(time.Date(1970, time.June, 15, 0, 0, 0, 0, time.UTC)))
 }
 
 func TestParseLocalDate(t *testing.T) {