diff --git a/src/period-calculation/get-fixed-period-by-date/get-fixed-period-by-date.ethiopic.spec.ts b/src/period-calculation/get-fixed-period-by-date/get-fixed-period-by-date.ethiopic.spec.ts
index a9e6459..642a20d 100644
--- a/src/period-calculation/get-fixed-period-by-date/get-fixed-period-by-date.ethiopic.spec.ts
+++ b/src/period-calculation/get-fixed-period-by-date/get-fixed-period-by-date.ethiopic.spec.ts
@@ -37,6 +37,17 @@ describe('Ethiopic Calendar period by date calculation', () => {
             expect(actual?.id).toBe('2014W1')
         })
 
+        it('should return "2018W1" for period type "WEEKLY" on "2017-13-04"', () => {
+            const actual = getFixedPeriodByDate({
+                periodType: 'WEEKLY',
+                date: '2017-13-04',
+                calendar: 'ethiopic',
+                locale: 'en',
+            })
+
+            expect(actual?.id).toBe('2018W1')
+        })
+
         it('should return "2010WedW52" for period type "WEEKLYWED" on "2011-01-01"', () => {
             const actual = getFixedPeriodByDate({
                 periodType: 'WEEKLYWED',
@@ -136,7 +147,7 @@ describe('Ethiopic Calendar period by date calculation', () => {
             expect(actual?.id).toBe('2014BiW26')
         })
 
-        it('should return "2012SunW1" for period type "BIWEEKLY" on "2012-01-01"', () => {
+        it('should return "2012BiW1" for period type "BIWEEKLY" on "2012-01-01"', () => {
             const actual = getFixedPeriodByDate({
                 periodType: 'BIWEEKLY',
                 date: '2012-01-01',
@@ -146,6 +157,17 @@ describe('Ethiopic Calendar period by date calculation', () => {
 
             expect(actual?.id).toBe('2012BiW1')
         })
+
+        it('should return "2018BiW1" for period type "BIWEEKLY" on "2017-13-04"', () => {
+            const actual = getFixedPeriodByDate({
+                periodType: 'BIWEEKLY',
+                date: '2017-13-04',
+                calendar: 'ethiopic',
+                locale: 'en',
+            })
+
+            expect(actual?.id).toBe('2018BiW1')
+        })
     })
 
     describe('monthly periods', () => {
diff --git a/src/period-calculation/get-fixed-period-by-date/get-fixed-period-by-date.gregorian.spec.ts b/src/period-calculation/get-fixed-period-by-date/get-fixed-period-by-date.gregorian.spec.ts
index 96de717..ea882b9 100644
--- a/src/period-calculation/get-fixed-period-by-date/get-fixed-period-by-date.gregorian.spec.ts
+++ b/src/period-calculation/get-fixed-period-by-date/get-fixed-period-by-date.gregorian.spec.ts
@@ -30,6 +30,14 @@ describe('Gregorian Calendar period by date calculation', () => {
             expect(actual?.id).toBe('2022W1')
         })
 
+        it('should return "2025W1" for period type "WEEKLY" on "2024-12-31"', () => {
+            const periodType = 'WEEKLY'
+            const date = '2024-12-31'
+            const actual = getFixedPeriodByDate({ periodType, date, calendar })
+
+            expect(actual?.id).toBe('2025W1')
+        })
+
         it('should return "2018WedW52" for period type "WEEKLYWED" on "2019-01-01"', () => {
             const periodType = 'WEEKLYWED'
             const date = '2019-01-01'
@@ -94,6 +102,14 @@ describe('Gregorian Calendar period by date calculation', () => {
             expect(actual?.id).toBe('2023SunW1')
         })
 
+        it('should return "2025SunW1" for period type "WEEKLYSUN" on "2024-12-31"', () => {
+            const periodType = 'WEEKLYSUN'
+            const date = '2024-12-31'
+            const actual = getFixedPeriodByDate({ periodType, date, calendar })
+
+            expect(actual?.id).toBe('2025SunW1')
+        })
+
         it('should return "2020BiW26" for period type "BIWEEKLY" on "2021-01-01"', () => {
             const periodType = 'BIWEEKLY'
             const date = '2021-01-01'
@@ -102,13 +118,21 @@ describe('Gregorian Calendar period by date calculation', () => {
             expect(actual?.id).toBe('2020BiW26')
         })
 
-        it('should return "2020SunW1" for period type "BIWEEKLY" on "2020-01-01"', () => {
+        it('should return "2020BiW1" for period type "BIWEEKLY" on "2020-01-01"', () => {
             const periodType = 'BIWEEKLY'
             const date = '2020-01-01'
             const actual = getFixedPeriodByDate({ periodType, date, calendar })
 
             expect(actual?.id).toBe('2020BiW1')
         })
+
+        it('should return "2025BiW1" for period type "BIWEEKLY" on "2024-12-31"', () => {
+            const periodType = 'BIWEEKLY'
+            const date = '2024-12-31'
+            const actual = getFixedPeriodByDate({ periodType, date, calendar })
+
+            expect(actual?.id).toBe('2025BiW1')
+        })
     })
 
     describe('monthly periods', () => {
diff --git a/src/period-calculation/get-fixed-period-by-date/get-fixed-period-by-date.nepali.spec.ts b/src/period-calculation/get-fixed-period-by-date/get-fixed-period-by-date.nepali.spec.ts
index 478f461..aeef220 100644
--- a/src/period-calculation/get-fixed-period-by-date/get-fixed-period-by-date.nepali.spec.ts
+++ b/src/period-calculation/get-fixed-period-by-date/get-fixed-period-by-date.nepali.spec.ts
@@ -37,6 +37,17 @@ describe('Nepali Calendar period by date calculation', () => {
             expect(actual.id).toBe('2078W1')
         })
 
+        it('should return "2083W1" for period type "WEEKLY" on "2082-12-30"', () => {
+            const actual = getFixedPeriodByDate({
+                periodType: 'WEEKLY',
+                date: '2082-12-30',
+                calendar: 'nepali',
+                locale: 'en',
+            })
+
+            expect(actual.id).toBe('2083W1')
+        })
+
         it('should return "2075WedW53" for period type "WEEKLYWED" on "2076-01-01"', () => {
             const actual = getFixedPeriodByDate({
                 periodType: 'WEEKLYWED',
@@ -81,6 +92,17 @@ describe('Nepali Calendar period by date calculation', () => {
             expect(actual.id).toBe('2076ThuW1')
         })
 
+        it('should return "2069ThuW1" for period type "WEEKLYTHU" on "2068-12-30"', () => {
+            const actual = getFixedPeriodByDate({
+                periodType: 'WEEKLYTHU',
+                date: '2068-12-30',
+                calendar: 'nepali',
+                locale: 'en',
+            })
+
+            expect(actual.id).toBe('2069ThuW1')
+        })
+
         it('should return "2077SatW53" for period type "WEEKLYSAT" on "2078-01-01"', () => {
             const actual = getFixedPeriodByDate({
                 periodType: 'WEEKLYSAT',
diff --git a/src/period-calculation/get-fixed-period-by-date/get-weekly-fixed-period-by-date.ts b/src/period-calculation/get-fixed-period-by-date/get-weekly-fixed-period-by-date.ts
index c5338b9..eeebd7b 100644
--- a/src/period-calculation/get-fixed-period-by-date/get-weekly-fixed-period-by-date.ts
+++ b/src/period-calculation/get-fixed-period-by-date/get-weekly-fixed-period-by-date.ts
@@ -21,8 +21,8 @@ const getWeeklyFixedPeriodByDate: GetWeeklyFixedPeriodByDate = ({
         startingDay: 1,
     })
 
-    // if start date of first period of year is after current date get last
-    // period of last year
+    // if current date is before start date of first period of year
+    // get last period of previous year
     if (date < weeklyPeriods[0].startDate) {
         return generateFixedPeriodsWeekly({
             year: year - 1,
@@ -32,6 +32,17 @@ const getWeeklyFixedPeriodByDate: GetWeeklyFixedPeriodByDate = ({
         }).slice(-1)[0]
     }
 
+    // if current date is after end date of last period of year
+    // get first period of following year
+    if (date > weeklyPeriods.slice(-1)[0].endDate) {
+        return generateFixedPeriodsWeekly({
+            year: year + 1,
+            calendar,
+            periodType,
+            startingDay: 1,
+        })[0]
+    }
+
     const fixedPeriod = weeklyPeriods.find((currentPeriod) => {
         return (
             // On or after start date of current period