Sunrise and Sunset times in Yen Lac, Vietnam 
Yen Lac
Vĩnh Phúc
Time zone: Asia/Ho_Chi_Minh, UTC 7 h.
Latitude: 21.2365, Longitude: 105.573
| Date | Sunrise | Solar Noon | Sunset | Length of day |
|---|---|---|---|---|
| 2025-Jun-01, Sunday | 05:15:17 | 11:55:33 | 18:35:49 | 13h 20m 32s |
| 2025-Jun-02, Monday | 05:15:12 | 11:55:43 | 18:36:13 | 13h 21m 1s |
| 2025-Jun-03, Tuesday | 05:15:08 | 11:55:53 | 18:36:37 | 13h 21m 29s |
| 2025-Jun-04, Wednesday | 05:15:05 | 11:56:03 | 18:37:01 | 13h 21m 56s |
| 2025-Jun-05, Thursday | 05:15:03 | 11:56:13 | 18:37:24 | 13h 22m 21s |
| 2025-Jun-06, Friday | 05:15:02 | 11:56:24 | 18:37:46 | 13h 22m 44s |
| 2025-Jun-07, Saturday | 05:15:02 | 11:56:35 | 18:38:09 | 13h 23m 7s |
| 2025-Jun-08, Sunday | 05:15:03 | 11:56:47 | 18:38:30 | 13h 23m 27s |
| 2025-Jun-09, Monday | 05:15:05 | 11:56:58 | 18:38:52 | 13h 23m 47s |
| 2025-Jun-10, Tuesday | 05:15:08 | 11:57:10 | 18:39:12 | 13h 24m 4s |
| 2025-Jun-11, Wednesday | 05:15:12 | 11:57:22 | 18:39:33 | 13h 24m 21s |
| 2025-Jun-12, Thursday | 05:15:17 | 11:57:35 | 18:39:52 | 13h 24m 35s |
| 2025-Jun-13, Friday | 05:15:23 | 11:57:47 | 18:40:11 | 13h 24m 48s |
| 2025-Jun-14, Saturday | 05:15:30 | 11:58:00 | 18:40:30 | 13h 25m 0s |
| 2025-Jun-15, Sunday | 05:15:38 | 11:58:13 | 18:40:48 | 13h 25m 10s |
| 2025-Jun-16, Monday | 05:15:46 | 11:58:26 | 18:41:05 | 13h 25m 19s |
| 2025-Jun-17, Tuesday | 05:15:56 | 11:58:39 | 18:41:21 | 13h 25m 25s |
| 2025-Jun-18, Wednesday | 05:16:06 | 11:58:52 | 18:41:37 | 13h 25m 31s |
| 2025-Jun-19, Thursday | 05:16:17 | 11:59:05 | 18:41:52 | 13h 25m 35s |
| 2025-Jun-20, Friday | 05:16:29 | 11:59:18 | 18:42:06 | 13h 25m 37s |
| 2025-Jun-21, Saturday | 05:16:42 | 11:59:31 | 18:42:20 | 13h 25m 38s |
| 2025-Jun-22, Sunday | 05:16:56 | 11:59:44 | 18:42:32 | 13h 25m 36s |
| 2025-Jun-23, Monday | 05:17:10 | 11:59:57 | 18:42:44 | 13h 25m 34s |
| 2025-Jun-24, Tuesday | 05:17:25 | 12:00:10 | 18:42:55 | 13h 25m 30s |
| 2025-Jun-25, Wednesday | 05:17:41 | 12:00:23 | 18:43:05 | 13h 25m 24s |
| 2025-Jun-26, Thursday | 05:17:57 | 12:00:35 | 18:43:14 | 13h 25m 17s |
| 2025-Jun-27, Friday | 05:18:14 | 12:00:48 | 18:43:22 | 13h 25m 8s |
| 2025-Jun-28, Saturday | 05:18:31 | 12:01:00 | 18:43:29 | 13h 24m 58s |
| 2025-Jun-29, Sunday | 05:18:49 | 12:01:12 | 18:43:35 | 13h 24m 46s |
| 2025-Jun-30, Monday | 05:19:08 | 12:01:24 | 18:43:40 | 13h 24m 32s |
Yen Lac on Vietnam map:
Cities in the same time zone Asia/Ho_Chi_Minh
Ho Chi Minh City (Hồ Chí Minh), Hanoi (Hà Nội), Haiphong (Hải Phòng), Can Tho (Cần Thơ), Quang Ha (Quảng Nam), Hue (Thừa Thiên-Huế), Quy Nhon (Bình Định), Bien Hoa (Đồng Nai), Vinh (Nghệ An), Thai Nguyen (Thái Nguyên), Nha Trang (Khánh Hòa), Ca Mau (Cà Mau), Viet Tri (Phú Thọ), Long Xuyen (An Giang), Buon Ma Thuot (Đắk Lắk), Phan Thiet (Bình Thuận), Soc Trang (Sóc Trăng), Rach Gia (Kiến Giang), Ap Da Loi (Lâm Đồng), Quang Ngai (Quảng Ngãi), Vung Tau (Bà Rịa-Vũng Tàu), Thu Dau Mot (Bình Dương), Nam Dinh (Nam Định), Bac Lieu (Bạc Liêu), Thai Binh (Thái Bình), Thanh Hoa (Thanh Hóa), Son Tay (Hà Nội), Dong Hoi (Quảng Bình), Phan Rang-Thap Cham (Ninh Thuận), Ha Long (Quảng Ninh)
Largest Populated Areas in Vietnam
Ho Chi Minh City (Hồ Chí Minh), Hanoi (Hà Nội), Haiphong (Hải Phòng), Can Tho (Cần Thơ), Quang Ha (Quảng Nam), Hue (Thừa Thiên-Huế), Quy Nhon (Bình Định), Bien Hoa (Đồng Nai), Vinh (Nghệ An), Thai Nguyen (Thái Nguyên), Nha Trang (Khánh Hòa), Ca Mau (Cà Mau), Viet Tri (Phú Thọ), Long Xuyen (An Giang), Buon Ma Thuot (Đắk Lắk), Phan Thiet (Bình Thuận), Soc Trang (Sóc Trăng), Rach Gia (Kiến Giang), Ap Da Loi (Lâm Đồng), Quang Ngai (Quảng Ngãi), Vung Tau (Bà Rịa-Vũng Tàu), Thu Dau Mot (Bình Dương), Nam Dinh (Nam Định), Bac Lieu (Bạc Liêu), Thai Binh (Thái Bình), Thanh Hoa (Thanh Hóa), Son Tay (Hà Nội), Dong Hoi (Quảng Bình), Phan Rang-Thap Cham (Ninh Thuận), Ha Long (Quảng Ninh)
Daylight Hours FAQ: 10 Most Googled Questions Answered
1. What are daylight hours?
Daylight hours refer to the period between sunrise and sunset. This duration changes throughout the year based on season and geographic location.
2. Why are days shorter in winter and longer in summer?
Earth's 23.5° axial tilt causes uneven sunlight distribution. Your hemisphere receives less direct sunlight in winter (shorter days) and more in summer (longer days).
3. When is the longest day of the year?
Northern Hemisphere: June 20-22 (summer solstice).
Southern Hemisphere: December 21-23.
Near polar circles, the sun doesn't set for 24 hours.
4. When is the shortest day of the year?
Northern Hemisphere: December 21-22 (winter solstice).
Southern Hemisphere: June 20-21.
5. How does latitude affect daylight hours?
The closer to poles, the more extreme variations:
- Equator: ~12-hour days year-round
- Polar regions: Midnight sun/polar nights occur
6. Why do New York and Miami have different day lengths?
Miami's lower latitude means:
- Winter days are longer than NY's
- Summer days are slightly shorter
7. When are day and night equal?
During equinoxes:
- Spring: March 20-21
- Fall: September 22-23
How fast do days lengthen/shorten?
Most rapid change near equinoxes: 2-4 minutes daily.
Slowest change near solstices: <1 minute daily.
9. Where can I check daylight hours for my city?
Reliable tools:
- Timeanddate.com
- SunCalc.org
- Photographer's Ephemeris app
10. Does daylight affect health?
Yes. Reduced winter sunlight may cause:
- Seasonal Affective Disorder (SAD)
- Vitamin D deficiency
Solution: Light therapy lamps & midday walks