diff --git a/cryptor/rsa_private_example.pem b/cryptor/rsa_private_example.pem
index 0949b05..88d252d 100644
--- a/cryptor/rsa_private_example.pem
+++ b/cryptor/rsa_private_example.pem
@@ -1,51 +1,51 @@
 -----BEGIN rsa private key-----
-MIIJJwIBAAKCAgEAsELqn9abxs7ZK81Ipbp5+E/5SrOQycAalnRCES3YPOoAV3Ir
-+99WjEi9Ak4EYS3VrvgISSNiRx1tHDNpBlBqGF+Mww8wAUmrcXsEndbHma/g3zHG
-ueua9GK0l+hQJ/grkatykgD81gam/SPOMPnJSsoQlsTgM47ZHM35adiXqL/gDMZ7
-0lQdB2+03WJXlvfYZWpHsXDqUkveEZbLgZST36ax8ap+Ge2GoLlD1sNapRxMBH1P
-GNdzSdV7ZJmzQ3WmjwDAddLX73YE6vhR5tDAXhrSweNPtIjUhGJsgkW9VTEQWeW9
-cZmFo/jYuvEDgBnZOh1DJe2BHx06Ymr8ZcgsOBYddANsk750II8+qUnBekiJkpo0
-ldCK2VnsLoLM3YCf3Lk7VYuHP6KiCXyh6FzbY1DTRHJRpMJYT8t5xyQis581DbRV
-Pkcse3ig5KsQLe5XXbBBegVrQJpy1b440uZVW2eSpStX5ZAfNVsU0ZPdI4/i6UNM
-Ea6c7tf83S21Q0K6SEZ5PrfBJECRDxFzJWeamwppHY8fdeItVk/cxBJ9XRyOyG9p
-JKMnOMFD++LzGP6uL5FKov7BSplOIMqsJzwh4zkIjAhgbGVQZm17kg1xvF30c2fg
-ijNEoSIuVWJzlQyQ9cmSaSmmi+SPmf/C/IcUDF0nikERs1v58vNESvcZP80CAwEA
-AQKCAgBEN2G+wrw/UUbToPuAyI7z/1+n/Z8HtgWUPSJkq62IxbekIFfNfz5rxKsB
-/VfMlISi1vO9+qfKhiT4SR1YiD7HeBNuWq5lkTF9FfNPcxSE8oDBYO5cfkbWVm02
-bX64OWADXKtWvnMcEi8GwZjHc6ToARQyhbePvLViZIUm5eCsOrZnu1moqU0i16TU
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-WnbUWSytRS37u9PBSvqRpH5SlgomdgzbTWe4GK2fvIsTcgTKR4CU41YCmjOIZHN9
-NJwN27N3C7ui7XxzuB6tDFu/vCAtsb9//b6PYlLcrOscAJt70GFeUTepeRqt+YOI
-IpvCzVDH0RnNnoscnWUyq/9cEjvkFzFljnU+mmY+OdjoJTCzLaKP0fJwXU5PpgVx
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+NvCmDHeVccX+z3Ue6w3mWPpW0fGXJKNBbcDuEl6qDNymGjDOSPjXhID/nSjvF4Nb
+RwIXPgB1OL1+4mUskO5xSguQhNHlMkMy3JytK+lXGclMsckWmsexRaaznsHOkn53
+bdDhoWuomSFA1QCurPFcF37HNknKrrZCZywnR5wRLG3zWgkFnAb1ePhmyrUSaSAJ
+d0tKGJgdQkjetmIJzwsaIpviSKue5cGQWqSQI4oOV6BPmPw6MoApfK0wlOw=
 -----END rsa private key-----
diff --git a/cryptor/rsa_public_example.pem b/cryptor/rsa_public_example.pem
index 2ee7341..724d49d 100644
--- a/cryptor/rsa_public_example.pem
+++ b/cryptor/rsa_public_example.pem
@@ -1,14 +1,14 @@
 -----BEGIN rsa public key-----
-MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAsELqn9abxs7ZK81Ipbp5
-+E/5SrOQycAalnRCES3YPOoAV3Ir+99WjEi9Ak4EYS3VrvgISSNiRx1tHDNpBlBq
-GF+Mww8wAUmrcXsEndbHma/g3zHGueua9GK0l+hQJ/grkatykgD81gam/SPOMPnJ
-SsoQlsTgM47ZHM35adiXqL/gDMZ70lQdB2+03WJXlvfYZWpHsXDqUkveEZbLgZST
-36ax8ap+Ge2GoLlD1sNapRxMBH1PGNdzSdV7ZJmzQ3WmjwDAddLX73YE6vhR5tDA
-XhrSweNPtIjUhGJsgkW9VTEQWeW9cZmFo/jYuvEDgBnZOh1DJe2BHx06Ymr8Zcgs
-OBYddANsk750II8+qUnBekiJkpo0ldCK2VnsLoLM3YCf3Lk7VYuHP6KiCXyh6Fzb
-Y1DTRHJRpMJYT8t5xyQis581DbRVPkcse3ig5KsQLe5XXbBBegVrQJpy1b440uZV
-W2eSpStX5ZAfNVsU0ZPdI4/i6UNMEa6c7tf83S21Q0K6SEZ5PrfBJECRDxFzJWea
-mwppHY8fdeItVk/cxBJ9XRyOyG9pJKMnOMFD++LzGP6uL5FKov7BSplOIMqsJzwh
-4zkIjAhgbGVQZm17kg1xvF30c2fgijNEoSIuVWJzlQyQ9cmSaSmmi+SPmf/C/IcU
-DF0nikERs1v58vNESvcZP80CAwEAAQ==
+MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAm1rBCE+U+7M46S21q0yo
+ygTXHlhnZZ6IfQwRCK24EFQ6yBxtemHKjNuHEIQ/DlSh+B5DRX/bCHQ/m5c0yrNP
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+QCJb+bfEG533B5Yrgm85C+sPcxrK684+Dmn+Y3wdQQNJgYgQGZDGDIRY8stWpRX9
+G2dnWQfVtZLmSM5WwVPeI4wa6dxizk/ukylsgk9E5zJjZlPx8Fx2hnTsrNSARl0g
+CdbhGhRjHlVFjKI80z+evPXLCYn8B4CwWsg6ExBZSOAvcrN7XZFcalDCT5CqsNpb
+Cg/7SXO87v8KL/54fKUc4qsCAwEAAQ==
 -----END rsa public key-----
diff --git a/datetime/datetime.go b/datetime/datetime.go
index dd6f4e1..67e1474 100644
--- a/datetime/datetime.go
+++ b/datetime/datetime.go
@@ -443,3 +443,50 @@ func GenerateDatetimesBetween(start, end time.Time, layout string, interval stri
 
 	return result, nil
 }
+
+// Min returns the earliest time among the given times.
+// Play: todo
+func Min(t1 time.Time, times ...time.Time) time.Time {
+	minTime := t1
+
+	for _, t := range times {
+		if t.Before(minTime) {
+			minTime = t
+		}
+	}
+
+	return minTime
+}
+
+// Max returns the latest time among the given times.
+// Play: todo
+func Max(t1 time.Time, times ...time.Time) time.Time {
+	maxTime := t1
+
+	for _, t := range times {
+		if t.After(maxTime) {
+			maxTime = t
+		}
+	}
+
+	return maxTime
+}
+
+// MaxMin returns the latest and earliest time among the given times.
+// Play: todo
+func MaxMin(t1 time.Time, times ...time.Time) (maxTime time.Time, minTime time.Time) {
+	maxTime = t1
+	minTime = t1
+
+	for _, t := range times {
+		if t.Before(minTime) {
+			minTime = t
+		}
+
+		if t.After(maxTime) {
+			maxTime = t
+		}
+	}
+
+	return maxTime, minTime
+}
diff --git a/datetime/datetime_example_test.go b/datetime/datetime_example_test.go
index 99098bc..da0b1c5 100644
--- a/datetime/datetime_example_test.go
+++ b/datetime/datetime_example_test.go
@@ -437,3 +437,32 @@ func ExampleGenerateDatetimesBetween() {
 	// [2024-09-01 00:00:00 2024-09-01 01:00:00 2024-09-01 02:00:00]
 	// <nil>
 }
+
+func ExampleMin() {
+	result := Min(time.Date(2024, time.September, 1, 0, 0, 0, 0, time.UTC), time.Date(2024, time.September, 2, 0, 0, 0, 0, time.UTC))
+
+	fmt.Println(result)
+
+	// Output:
+	// 2024-09-01 00:00:00 +0000 UTC
+}
+
+func ExampleMax() {
+	result := Max(time.Date(2024, time.September, 1, 0, 0, 0, 0, time.UTC), time.Date(2024, time.September, 2, 0, 0, 0, 0, time.UTC))
+
+	fmt.Println(result)
+
+	// Output:
+	// 2024-09-02 00:00:00 +0000 UTC
+}
+
+func ExampleMaxMin() {
+	max, min := MaxMin(time.Date(2024, time.September, 1, 0, 0, 0, 0, time.UTC), time.Date(2024, time.September, 2, 0, 0, 0, 0, time.UTC), time.Date(2024, time.September, 3, 0, 0, 0, 0, time.UTC))
+
+	fmt.Println(max)
+	fmt.Println(min)
+
+	// Output:
+	// 2024-09-03 00:00:00 +0000 UTC
+	// 2024-09-01 00:00:00 +0000 UTC
+}
diff --git a/datetime/datetime_test.go b/datetime/datetime_test.go
index ee90ff9..acb7020 100644
--- a/datetime/datetime_test.go
+++ b/datetime/datetime_test.go
@@ -521,3 +521,60 @@ func TestGenerateDatetimesBetween(t *testing.T) {
 		}
 	})
 }
+
+func TestMin(t *testing.T) {
+	t.Parallel()
+
+	assert := internal.NewAssert(t, "TestMin")
+
+	zeroTime := time.Time{}
+	now := time.Now()
+	oneMinuteAgo := now.Add(-time.Minute)
+	oneMinuteAfter := now.Add(time.Minute)
+
+	assert.Equal(zeroTime, Min(zeroTime, now, oneMinuteAgo, oneMinuteAfter))
+
+	assert.Equal(zeroTime, Min(now, zeroTime))
+
+	assert.Equal(oneMinuteAgo, Min(oneMinuteAgo, now, oneMinuteAfter))
+}
+
+func TestMax(t *testing.T) {
+	t.Parallel()
+
+	assert := internal.NewAssert(t, "TestMax")
+
+	zeroTime := time.Time{}
+	now := time.Now()
+	oneMinuteAgo := now.Add(-time.Minute)
+	oneMinuteAfter := now.Add(time.Minute)
+
+	assert.Equal(oneMinuteAfter, Max(zeroTime, now, oneMinuteAgo, oneMinuteAfter))
+
+	assert.Equal(now, Max(now, zeroTime))
+
+	assert.Equal(oneMinuteAfter, Max(oneMinuteAgo, now, oneMinuteAfter))
+}
+
+func TestMaxMin(t *testing.T) {
+	t.Parallel()
+
+	assert := internal.NewAssert(t, "TestMinMax")
+
+	zeroTime := time.Time{}
+	now := time.Now()
+	oneMinuteAgo := now.Add(-time.Minute)
+	oneMinuteAfter := now.Add(time.Minute)
+
+	max, min := MaxMin(zeroTime, now, oneMinuteAgo, oneMinuteAfter)
+	assert.Equal(zeroTime, min)
+	assert.Equal(oneMinuteAfter, max)
+
+	max, min = MaxMin(now, zeroTime)
+	assert.Equal(zeroTime, min)
+	assert.Equal(now, max)
+
+	max, min = MaxMin(oneMinuteAgo, now, oneMinuteAfter)
+	assert.Equal(oneMinuteAgo, min)
+	assert.Equal(oneMinuteAfter, max)
+}