What Is Today 28/07/2026 On the Lunar Calendar?
Today 28/07/2026 (solar calendar) corresponds to day 15 month 6 year Bính Ngọ on the lunar calendar. Auspicious hours today (Dai An, Toc Hy, Tieu Cat): giờ Tý (23:00–01:00), giờ Dần (03:00–05:00), giờ Thìn (07:00–09:00), giờ Ngọ (11:00–13:00), giờ Thân (15:00–17:00), giờ Tuất (19:00–21:00).
Click day 28/7 on the calendar above to see full details: day star, auspicious/inauspicious status, and all 12 Luc Dieu hours.
What Is Luc Dieu by Hour?
Luc Dieu (六曜) is a system of 6 alternating omens cycling through each hour of the day, originating from Chinese calendar tradition and widely used in the Vietnamese lunar calendar. Each day starts with a different dieu at the Ty hour (23:00), and the 6 dieu follow in sequence through all 12 earthly-branch hours.
Calculation: The day of the week determines which dieu starts at the Ty hour — Sun & Sat: Dai An · Mon: Luu Lien · Tue: Toc Hy · Wed: Xich Khau · Thu: Tieu Cat · Fri: Khong Vong.
Frequently Asked Questions About the Lunar Calendar
What is an auspicious day (Hoang Dao)? How many are there per month?
Hoang Dao days are favourable, lucky days according to feng shui. Each 12-day lunar cycle contains 6 Hoang Dao (auspicious) and 6 Hac Dao (inauspicious) days alternating. The six Hoang Dao stars are: Thanh Long, Minh Duong, Kim Quy, Bao Quang, Ngoc Duong, and Tu Menh.
How to choose a good day to open a shop?
To choose a good opening day: pick a Hoang Dao day (avoid Hac Dao), ensure it does not clash with the owner's birth year, avoid Tam Nuong days (3rd, 7th, 13th, 18th, 22nd, 27th lunar) and Nguyet Ky days (5th, 14th, 23rd lunar). Combine with Dai An or Toc Hy hours for best results.
Which days of the month are Tam Nuong days?
Tam Nuong days fall on the 3rd, 7th, 13th, 18th, 22nd, and 27th of the lunar month — 6 days per month total. In Vietnamese folk tradition these are inauspicious days; avoid weddings, business openings, travel, and moving home.
What are Nguyet Ky days? How do they differ from Tam Nuong?
Nguyet Ky days fall on the 5th, 14th, and 23rd of the lunar month. Both Tam Nuong and Nguyet Ky are inauspicious, but Tam Nuong is more strictly avoided in folk tradition. Our lunar calendar marks both types clearly.
What factors should I consider for a good wedding date?
For a wedding date: choose a Hoang Dao day, not a Tam Nuong or Nguyet Ky day, and avoid clashing earthly branches with either person. Favourable wedding months are typically the 2nd, 3rd, 6th, and 8th lunar months. Check the specific month's calendar here and use the "Xem Ngay Tot Xau" feature to filter by purpose.
How does the lunar calendar differ from the solar calendar?
The solar calendar (Gregorian) is based on Earth's orbit around the Sun (365/366 days). The lunar calendar is based on the Moon's cycle (354 days), ~11 days shorter per year, compensated by a leap month every 2–3 years. The Vietnamese calendar uses lunar can-chi to calculate festivals, Tet, and feng shui dates.
What is the quickest way to convert a solar date to a lunar date?
Click any date cell on the lunar calendar on this page to instantly see the corresponding lunar date. The system converts automatically using a standard Vietnamese calendar algorithm including leap months.
Where can I look up good/bad days for a specific purpose (opening, wedding, travel)?
The Xem Ngay Tot Xau page at diencamtamthe.com/xem-ngay-tot lets you filter days by purpose (business opening, wedding, moving in, travel, contract signing) and check for birth-year conflicts. This lunar calendar page shows the full monthly calendar with colour-coded good and bad days.
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About This Lunar Calendar
The Lunar Calendar at Tu Vi & Van Menh AI uses a standard Vietnamese lunar-solar conversion algorithm to display: lunar dates, day stars, Hoang Dao/Hac Dao status, Tam Nuong, Nguyet Ky, and all 12 Luc Dieu hours per day. Data is updated automatically in the Vietnam timezone (GMT+7).