Asalha Puja and Khao Phansa: Buddhist Lent for Teachers
Full Moon. Next Day Monks Stay In. Cover Knees.
I've lived in Thailand for 20 years, and from our office in Ban Lum I tell new teachers the same thing about Asalha Puja: it falls on the full moon of the eighth lunar month, the next day monks begin their three-month stay, and at the temple you cover your shoulders and knees and follow your Thai colleagues. The date moves each year, so check your school calendar.
Asalha Puja (อาสาฬหบูชา) falls on the full moon of the eighth Thai lunar month and remembers the Buddha's first sermon. The next day is Wan Khao Phansa (วันเข้าพรรษา), the start of Buddhist Lent and the three-month rains retreat. The date moves each year, so check your school calendar or TAT. Schools are often closed and alcohol sales are commonly reported as restricted, but your school decides. At the temple, cover your shoulders and knees and remember you are a guest.
01: What Is Asalha Puja?
A quiet full moon day, and a start to a three-month season.
"In 20 years here, what stays with me about Asalha Puja is how quiet it is. Cover your knees, follow your Thai colleagues, and remember that you are a guest at the temple."Matthew John : Co-Founder & Operations Manager, KET
The First Sermon 🎡
Asalha Puja remembers the Buddha's first sermon, at Deer Park in Sarnath, India.
The Three Jewels 💎
The day is linked with the first monastic community, the Sangha. That completes the Three Jewels: the Buddha, the Dharma (teachings) and the Sangha. For men who ordain, see Thai Monk Initiation.
A Moving Date 🌕
It falls on the full moon of the eighth lunar month, so the date moves each year on the Western calendar. Check your school calendar or TAT. Our Thai School Calendar page shows where it sits in the school year.
02: The First Sermon: Four Noble Truths
Kept short and plain. This is a summary, not a sermon.
1. Dukkha (Suffering) 🌧️
Recognizes that stress, dissatisfaction, and unexpected life changes are natural human experiences.
2. Samudaya (Cause) 🔗
Identifies craving, clinging, and unrealistic expectations as the underlying roots of emotional frustration.
3. Nirodha (Cessation) 🕊️
Shows that peace is possible when one lets go of stubborn attachments and anger.
4. Magga (The Path) 🛤️
Outlines the practical Eightfold Path as a guide toward daily calm and clear understanding.
⚖️ The Middle Way
The teaching offers a practical Middle Way between self-indulgence and extreme asceticism. If a Thai colleague or a student asks what you know about the day, that is enough to say, and it is fine to say that you are still learning.
03: Alms and Wian Tian
Morning offerings and evening candlelit circuits at local temples.
Morning Alms (Tak Bat) 🌅
Many people take food or flowers to their local temple in the morning, or offer food to monks. It is a way of making merit (tham bun). If you join, watch what your Thai friends do and copy them quietly.
Wian Tian (เวียนเทียน) 🕯️
In the evening people gather at the temple and walk clockwise around the main hall three times, usually holding a candle, incense and a flower. It is commonly said that each circuit honours one of the Three Jewels. Follow the group and keep your voice low.
Three circuits, clockwise04: Wan Khao Phansa: The Rains Retreat
The day after the full moon.
The Next Day 🌧️
The day after Asalha Puja is Wan Khao Phansa, the start of Buddhist Lent, the three-month rains retreat (Vassa). Monks remain inside a designated monastery for study and meditation.
Why the Rains? 🌾
The retreat is often explained as a way for monks to avoid walking through newly planted fields in the rainy season. Explanations vary, so ask a Thai colleague what they were taught.
Short Ordinations 🧡
Khao Phansa is a common time for men to ordain for a short period. Read more in Thai Monk Initiation.
Alcohol Sales 🚫
Alcohol sales are commonly reported as restricted on Asalha Puja and Wan Khao Phansa, but rules and local announcements vary. Buy anything you need the day before, and check local notices.
05: Temple Visits and Etiquette
You are a guest. Small habits go a long way.
Cover Shoulders and Knees 👕
Wear neat clothes that cover both shoulders and both knees, and take off your shoes where asked. If you are not sure, ask your Thai co-teacher first.
Keep Quiet 🤫
Speak in a low voice, put your phone on silent, and follow your Thai colleagues when you enter the hall.
Feet and Heads 🦶
Do not point your feet at the Buddha image or at monks, and do not touch anyone on the head. Sit tucked to one side if you are on the floor.
Ubon Candle Festival 🐝
In Ubon Ratchathani, large carved wax candles are paraded at the start of Khao Phansa. You can enjoy your own town's version too. More in Festivals in Thailand.
06: Four Steps to Join In
Short and simple.
🛠️ How to Join Asalha Puja and Khao Phansa Respectfully
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Check the Date With Your School
Asalha Puja falls on the full moon of the eighth lunar month and moves each year. Check your school calendar or TAT, and ask your Thai co-teacher what your school does.
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Dress for the Temple
Cover your shoulders and knees, take off your shoes where asked, and remember that you are a guest.
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Join the Wian Tian Quietly
If you are invited, follow your Thai colleagues, walk clockwise around the hall three times with the group, and keep your voice low.
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Plan Around the Day
Schools are often closed and alcohol sales are commonly reported as restricted, but this varies. Buy what you need in advance and do not fix travel plans to a blog date.
Asalha Puja Questions
When is Asalha Puja celebrated in Thailand?
Asalha Puja falls on the full moon of the eighth Thai lunar month. The date moves each year on the Western calendar, so check your school calendar or TAT rather than a blog date. Our Thai school calendar page lists it under July.
What is commemorated on Asalha Puja?
The holiday commemorates the Buddha’s first sermon, known as Setting in Motion the Wheel of Dharma (Dhammacakkappavattana Sutta), at Deer Park in Sarnath. It marks the formation of the first monastic order (Sangha) and completes the Three Jewels: Buddha, Dharma, and Sangha.
What core teachings did the Buddha introduce on Asalha Puja?
The sermon introduced the Four Noble Truths (the reality of suffering, its origin, its cessation, and the path) and the Noble Eightfold Path, offering a practical Middle Way between self-indulgence and extreme asceticism.
What is the relationship between Asalha Puja and Wan Khao Phansa?
Asalha Puja takes place on the full moon day. The very next day is Wan Khao Phansa, which marks the start of Buddhist Lent (the three-month rains retreat or Vassa), during which monks usually stay at their own temple.
Are schools closed for these holidays in Thailand?
Usually, because both days are normally public holidays, but your school calendar decides. Check your school’s own notice for the exact days. Alcohol sales are commonly reported as restricted on these days, but rules vary, so check local announcements.
How can foreign teachers participate respectfully in temple events?
Cover your shoulders and knees, take off your shoes where asked, and follow your Thai colleagues. If you join the evening Wian Tian, walk clockwise around the hall three times with the group and keep your voice low. You are a guest at the temple.
Matthew John
Co-Founder & Operations ManagerI'm Matthew, co-founder of Kids English Thailand. I've lived in Thailand for 20 years and work from our office in Ban Lum, Sukhothai. Since 2009 we have placed over 1,500 teachers in Thai schools, and I still learn something from my Thai colleagues every year.
