If you are trying to plan your family’s winter vrats, the difficulty is not simply remembering dates. Lunar tithis, solar transitions, Dhanurmasa, and Tamil Margazhi observances overlap between mid-December and Makara Sankranti. A date copied into a phone calendar is therefore only the first step.
Use this as your planning calendar for the main observances from December 15, 2025, through January 14, 2026. Then verify tithi endings, sunrise, parana, Sankramana, and temple programmes against a Panchang calculated for your location.
The winter calendar at a glance
| Date or period | Observance | What to plan | What must be checked locally |
|---|---|---|---|
| December 15, 2025 | Saphala Ekadashi | Choose a suitable form of fasting, arrange Vishnu worship, and prepare for Dwadashi parana. | Local sunrise, the applicable Ekadashi convention, and the permitted parana period. |
| December 16, 2025-January 14, 2026 | Dhanurmasa Vratam | Establish a sustainable dawn routine of worship, recitation, sattvic conduct, dana, or seva. | Exact Dhanu and Makara Sankramana timings, local sunrise, and temple schedules. |
| December 18, 2025 | Krishna Paksha Chaturdashi | Households that observe Masik Shivaratri can plan quiet Shiva worship, japa, and simple offerings. | The local Chaturdashi span and the correct ritual period for your tradition. |
| January 11, 2026 | Koodaravalli | Recite the 27th Thiruppavai pashuram, make a sweet offering if that is your custom, and share prasadam. | Local temple recitations, puja timings, and community distribution plans. |
| January 14, 2026 | Makara Sankranti and the close of Dhanurmasa | Complete the month-long discipline and decide which part of it you will continue. | The precise Sankramana time and the customs followed by your region and sampradaya. |
These entries are not competing versions of one calendar. They belong to different layers of sacred time. Saphala Ekadashi and Krishna Chaturdashi are determined by lunar tithi; Dhanurmasa is framed by solar transitions; Koodaravalli belongs to the Tamil Margazhi devotional sequence. Keeping those layers distinct prevents most calendar confusion.
This is also a focused working calendar, not a universal list of every winter festival. Dhanurmasa commonly includes Vaikuntha Ekadashi, for example, but its exact observance should be entered only after you consult the Panchang and temple calendar used by your community.
Build one observance plan instead of five separate promises
The most demanding entry is not a single festival. It is the daily rhythm of Dhanurmasa from December 16 to January 14. If you commit to an elaborate routine that cannot survive workdays, school mornings, travel, or caregiving, the practice will become irregular before the month reaches Koodaravalli.
Choose your level of observance before Dhanurmasa begins:
- A minimum home practice: rise before sunrise, cleanse yourself and the worship space, light a lamp, make a simple offering, and complete one chosen recitation or period of nama-japa.
- A fuller Vaishnava practice: add tulasi offerings, Vishnu Sahasranama, verses from the Bhagavatam, or Thiruppavai according to your family tradition.
- A community practice: attend selected temple archana or recitations and connect the vrata with anna-dana, prasadam distribution, or another realistic form of seva.
You do not need to choose the longest option for the vrata to have integrity. The decisive question is whether your routine is reverent, regular, and within your capacity. A short discipline maintained throughout the month is more coherent than an ambitious programme that depends on ideal mornings.
Make the routine easier the night before. Set out the lamp and puja items, choose the text you will recite, and decide what naivedya is practical. If several family members are participating, assign tasks in advance. One person can prepare the worship space while another handles the offering or gathers children for recitation.
Use the right timing rule for each observance
A civil date begins at midnight. A dharmic observance may instead depend on which tithi is present at sunrise, during a prescribed ritual period, or at the moment of parana. Solar observances depend on Sankramana. This is why two trustworthy calendars can place emphasis differently without either one being careless.
For every date you intend to observe, record these details:
- Your city or nearest available location in the Panchang.
- Local sunrise for the day of the vrata and, where relevant, the following day.
- The beginning and ending times of the governing tithi.
- The stated parana period for an Ekadashi fast.
- The Sankramana time for the opening and close of Dhanurmasa.
- Your temple’s schedule and the calendar convention followed by your sampradaya.
The location setting matters especially in the diaspora. Do not use Indian clock times unchanged in Toronto, London, Singapore, or another city. A Panchang must reflect the longitude, latitude, time zone, and local sunrise of the place where you are observing.
December 18 shows why this check is necessary. In the calculation given for that date, Krishna Trayodashi continues until 2:35 AM and Krishna Chaturdashi follows for the remainder of the day. That does not make 2:35 AM a universal local time. Use it to understand the day’s tithi transition, then use your own Panchang to fix the ritual period.
What to do on each anchor date
December 15: Saphala Ekadashi
Saphala Ekadashi is associated with Sri Vishnu and with bringing action, intention, and remembrance into alignment. North Indian calendars place it in Paush Krishna Paksha, while Gujarati, Marathi, Kannada, and Telugu traditions identify the corresponding period as Margashirsha Krishna Paksha. The month-name difference does not erase the shared observance.
Decide your form of restraint before the vrata starts. Traditional practice ranges from phalahar to nirjala fasting according to capacity. Do not undertake a strict fast if it would endanger your health or interfere with medication. A gentler dietary observance, prayer, scriptural reading, and compassionate conduct remain meaningful; seek qualified medical advice when fasting safety is uncertain.
Keep the devotional centre clear: Vishnu puja with tulasi, Bhagavad-Gita reading, kirtana, or nama-japa. Avoid turning the day into a test of hunger while ordinary conduct remains agitated. The vrata joins bodily restraint to speech, attention, and action.
Do not treat the fast as complete when you go to sleep. Parana is performed on Dwadashi after sunrise within the locally prescribed period. Check that period before Ekadashi, not the next morning when the permitted window may already be narrow.
December 16-January 14: Dhanurmasa Vratam
Dhanurmasa turns the winter dawn into a daily devotional appointment. Its core is early worship of Vishnu supported by sattvic living, recitation, dana, and service. Tamil households observing Margazhi may centre the month on Thiruppavai, while other Vaishnava families may choose Vishnu Sahasranama, nama-japa, or Bhagavatam recitation.
Use the same basic sequence each morning so that preparation does not consume the time meant for worship:
- Rise before sunrise and complete personal cleansing.
- Clean or straighten the puja space.
- Light a deepa and make tulasi or other customary offerings to Vishnu.
- Complete the recitation, japa, or parayana chosen for the month.
- Offer simple naivedya according to your household practice.
- Carry the vrata into the day through measured consumption, truthful conduct, dana, or seva.
If you miss a morning, resume the next day without converting the lapse into abandonment. The purpose of a month-long vrata is to establish direction and steadiness, not to make one imperfect day more important than the remaining opportunities to practise.
December 18: Krishna Chaturdashi and monthly Shiva worship
Krishna Paksha Chaturdashi carries the inward tone of a moon approaching Amavasya. Households that observe Masik Shivaratri can use the day for Shiva japa, quiet prayer, simple offerings, and remembrance. The point is not to add another elaborate event to an already full month. It is to give the dark fortnight an appropriately contemplative practice.
Because the day begins with a tithi transition, do not infer the proper worship period merely from the civil date. Confirm Chaturdashi locally, especially if your tradition prescribes a particular night period.
January 11: Koodaravalli
Koodaravalli is the 27th day of Tamil Margazhi and belongs to Pavai Nombu. Its devotional centre is Sri Andal’s 27th Thiruppavai pashuram, beginning with the remembered phrase “Koodarai Vellum Seer Govinda.” The day expresses the joy of grace and the movement of a vow toward generous celebration.
A complete home observance can remain simple. Recite or listen attentively to the 27th pashuram, offer a sweet preparation such as akkaravadisal with butter if that is customary in your household, and share the prasadam. If children are participating, let them learn the meaning of the verse and take part in the distribution rather than remaining spectators.
Check nearby Vishnu temples well in advance. Special Thiruppavai recitations and prasadam programmes may take place early, and the useful planning deadline is the temple’s registration or preparation date, not January 11 itself.
January 14: Makara Sankranti and the close of Dhanurmasa
Makara Sankranti closes this Dhanurmasa cycle. Treat the transition as more than permission to stop waking early. Complete your chosen worship, make the closing offering or charitable act followed by your family, and identify one part of the month that should remain in ordinary life.
That continuation might be a regular dawn prayer, one weekly recitation, mindful food discipline, or recurring seva. Choose it before the month ends. Otherwise the routine usually disappears at the same moment as the festival decorations.
Key takeaways
- Enter December 15, December 16, December 18, January 11, and January 14 in your calendar now, but treat local Panchang verification as part of the entry.
- For Saphala Ekadashi, plan both the fast and Dwadashi parana; the vrata is not only an Ekadashi daytime event.
- For Dhanurmasa, choose a repeatable dawn practice before December 16 instead of improvising every morning.
- For December 18, verify the local Chaturdashi span rather than assuming that one published clock time applies everywhere.
- For Koodaravalli, connect the 27th Thiruppavai pashuram with prasadam sharing and intergenerational participation.
- Use January 14 to carry one Dhanurmasa discipline forward instead of ending the entire rhythm at Sankranti.
Preserve regional difference without creating calendar anxiety
A North Indian month name, a southern amanta month name, and a Tamil solar month can all describe the same season from different calendrical perspectives. Write the tradition beside the date in your family calendar: “Saphala Ekadashi—Paush/Margashirsha convention,” “Dhanurmasa dawn practice,” or “Koodaravalli—Margazhi day 27.” That small note is more useful than trying to force every observance into one vocabulary.
The same care applies in families whose members follow different Dharmic paths. Hindu vrata, Buddhist observance, Jain discipline, and Sikh seva should not be flattened into interchangeable rituals. They can still meet through self-restraint, truthful conduct, compassion, dana, ahimsa, and service. Preserve each practice’s identity while making shared generosity the household’s common work.
Your practical next step is small: enter the anchor dates, select your location-specific Panchang, ask your temple which convention it follows, and write down the dawn routine you can actually keep. Do that before December 15, and the season will begin with clarity rather than last-minute calendar searches.
References
- DharmaRenaissance Blog — December 18, 2025 Panchang Guide: Tithi Change, Krishna Paksha Chaturdashi, Ritual Meaning
- DharmaRenaissance Blog — Saphala Ekadashi 2025 Date and Significance: Paush Krishna Paksha Vrat Guide for Inner Success
- DharmaRenaissance Blog — Dhanurmasa Vratam 2025-2026: Sacred Dawn Devotion, Key Dates, and Scriptural Insights
- DharmaRenaissance Blog — Koodaravalli 2026 on January 11: A Sacred Margazhi Guide to Meaning, Rituals, and Community Joy
