📅 100% Client-Side Lunar & Event Calendar

Interactive Desk Calendar & Lunar Studio Pro

Interactive minimalist desk calendar with Vietnamese astronomical lunar dates (GMT+7), Can Chi zodiac, personal event markers, and A4 print mode.

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Tháng ,

Lunar Calendar: Ngày Tháng ()

Zodiac Year:

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📌 Notes & Events

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Zen Timekeeping

A Pure Desk Calendar: Restoring Serenity from Popups and Distractions

Whenever you need to check which day the upcoming full moon falls on for a family reunion, or calculate how many weeks remain until the New Year holiday, browsing typical calendar sites subjects you to flashing banner ads and dubious superstitious horoscopes. Time is life’s most precious, non-renewable asset. A quality calendar should not distract or clutter your thoughts; it should cultivate tranquility and intentional planning. This studio restores the clean, dignified aesthetic of a physical minimalist desk calendar directly to your screen.

How to Use the Interactive Calendar & Mark Events in 3 Steps

Rapid keyboard navigation with offline localStorage persistence

Navigate Months or Press T

Use arrow buttons or dropdowns to span from 1900 to 2100. Press the T key anytime to jump straight back to today.

Inspect Lunar Dates & Zodiac

Check small corner numerals for Lunar days. The 1st and 15th are distinctly color-highlighted alongside Can Chi zodiacs.

Tag Events & Print A4

Click any date to add colored event tags and notes, or tap Print A4 to output a physical desk calendar.

Official Public Holidays & Traditional Festivals in Vietnam

Standard statutory holiday dates and traditional cultural observances

Festival / Holiday	Calendar Date	Significance	Statutory Status
🧧 Lunar New Year (Tet)	01/01 - 03/01 Âm Lịch	Largest family reunion and cultural holiday	5 - 7 days official break
🏛️ Hung Kings Memorial	10/03 Âm Lịch	Commemorating the founding kings of Vietnam	1 day official break
⭐ Reunification Day	30/04 Dương Lịch	National reunification celebration	1 day official break
🛠️ International Labor Day	01/05 Dương Lịch	Celebrating workers rights	1 day official break
🇻🇳 Vietnam National Day	02/09 Dương Lịch	Declaration of Independence in 1945	2 days official break
🥮 Mid-Autumn Festival	15/08 Âm Lịch	Harvest moon and children lantern festival	Cultural observance

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Astronomical Lunar Math

Astronomical moon phase formulas computed for GMT+7 meridian, avoiding the 1-day discrepancy with Beijing GMT+8 calendars.

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Private Event Marking

Tag birthdays, anniversaries, and deadlines with color indicators; securely preserved in client localStorage.

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Live Countdown Counter

Click any target date to reveal instant countdown metrics showing exact days and weeks remaining.

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A4 Desk Print Ready

One-click printer CSS formatted for landscape A4 output, perfect for physical pinboards and study spaces.

Frequently Asked Questions About the Lunar Calendar

In-depth answers regarding astronomical calculations and calendar history

1. Why does the Vietnamese lunar calendar sometimes differ by 1 day from the Chinese calendar? ▼

Vietnam is located in the GMT+7 timezone (105°E meridian), whereas China standardizes on Beijing GMT+8 (120°E meridian)—a 1-hour time difference. The first day of each lunar month is determined by the astronomical New Moon instant. If a new moon occurs between 23:00 and 23:59 GMT+7, it is already 0:00 to 0:59 the following day in GMT+8. Consequently, the month begins on different solar dates. Our studio strictly applies Vietnam astronomical formulas.

2. How are leap months determined in the lunar calendar? ▼

A synodic lunar month averages 29.53 days, yielding a 354-day lunar year (11 days shorter than the solar year). To reconcile the lunar cycle with solar agricultural seasons, 7 leap months are added over a 19-year Metonic cycle. A leap month is designated as the first lunar month following the Winter Solstice that does not contain a major Solar Term (Zhongqi).

3. How can I print the monthly calendar in high quality on A4? ▼

Simply click the "Print A4" button or press Ctrl + P (Cmd + P on macOS). In your browser print dialog, choose Landscape orientation, A4 paper size, and check the "Background graphics" box to ensure all borders and color tags reproduce crisply.

4. Are my notes and events saved when I close the browser? ▼

Never lost. Every personal note and tagged event is automatically persisted in your local browser storage (localStorage). Whenever you return to the page, your data loads instantly without requiring any login credentials.

5. Can I inspect dates 50 years in the past or future? ▼

Yes, absolutely. The astronomical algorithms support any date between 1900 and 2100 with astronomical precision. You can look up ancestral birth dates decades ago or forecast holiday schedules years into the future.

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