If you need to know which tithi applies to a puja, vrata, sankalpa, or family observance on July 27, the date alone is not enough. The relevant tithi changes during Monday afternoon.
In most regions, Monday, July 27, 2026 is Shukla Paksha Trayodashi until 4:00 PM, followed by Shukla Paksha Chaturdashi. Your first practical step is therefore to place the planned observance on the correct side of that transition.
July 27 Panchang at a glance
| Part of Monday, July 27 | Prevailing tithi | How to read it |
|---|---|---|
| Before the listed 4:00 PM transition | Shukla Paksha Trayodashi | The thirteenth tithi of the waxing half of the lunar cycle applies. |
| After the listed 4:00 PM transition | Shukla Paksha Chaturdashi | The fourteenth tithi of the waxing half applies. |
This is the essential distinction for the day. A morning observance falls under Trayodashi, while an observance held after the afternoon transition falls under Chaturdashi. Do not label the entire civil date with only one of those tithis when the timing of the ritual matters.
Why one civil date contains two tithis

A tithi is a lunar-calendar division, not another name for a midnight-to-midnight weekday. Its boundary can occur during the morning, afternoon, evening, or night. That is why a daily Panchang may show two tithis within one Gregorian date.
Shukla Paksha is the waxing, or light, half of the lunar cycle. Trayodashi is its thirteenth tithi, and Chaturdashi is its fourteenth. On July 27, the change from one to the next occurs at the listed afternoon boundary rather than at midnight.
This corrects a common calendar mistake. Seeing Chaturdashi associated with July 27 does not make the whole Monday Chaturdashi. Seeing Trayodashi at the start of the day does not make the whole Monday Trayodashi either. The clock time of your intended observance decides which label is relevant.
How to use the 4:00 PM transition

- Write down the actual time of the observance. “On Monday” is too broad for this date. Record whether the puja or sankalpa will occur before or after the listed transition.
- Match that time to the prevailing tithi. Use Trayodashi before the transition and Chaturdashi afterward. This prevents the Gregorian date from overriding the lunar timing.
- Avoid scheduling directly against the boundary. If the tithi is essential to the observance, choose a time clearly within the required period rather than relying on a clock reading at the moment of change.
- Confirm the timing for your location. The 4:00 PM entry is stated for most regions, not as a city-specific universal time. Consult the Panchang used by your local temple, sampradaya, or family when exact observance rules matter.
- Check the rule attached to the vrata or ritual. Some observances depend on the tithi prevailing during a particular part of the day. A general tithi transition cannot by itself settle every tradition-specific question.
If you are sharing the plan with relatives, write the entry in full: “Monday, July 27, 2026 — Shukla Trayodashi until 4:00 PM; Shukla Chaturdashi afterward.” That wording is far less likely to produce confusion than putting either tithi beside the date without its transition time.
What this tithi timing does not establish
The tithi tells you which lunar day prevails at a given time. It does not, by itself, establish that every hour within that tithi is an auspicious muhurta. A complete decision may also require location-specific sunrise and sunset information, nakshatra, yoga, karana, or time periods considered unsuitable for the intended activity.
This distinction matters when the decision has ritual consequences. You can use the 4:00 PM transition to distinguish Trayodashi from Chaturdashi, but you should not turn that single fact into a claim that the whole earlier or later period is automatically suitable for a wedding, griha pravesh, major purchase, or another samskara.
For ordinary daily worship, you can note the prevailing tithi and continue your established practice. For a formal vrata, temple service, or ceremony whose validity depends on precise timing, use a local Panchang and follow the rule of the relevant tradition or officiating priest.
Key takeaways
- Monday, July 27, 2026 carries Shukla Paksha Trayodashi until the listed 4:00 PM transition.
- Shukla Paksha Chaturdashi follows after that transition.
- A morning and an evening observance on the same civil date can therefore fall under different tithis.
- The transition identifies the lunar day; it does not provide a complete auspicious-time assessment.
- Use a location-specific Panchang when an exact vrata, muhurta, or temple rule depends on the boundary.
Before fixing your observance, place your city, intended clock time, and required tithi on the same calendar entry. For July 27, that small step is what prevents an afternoon tithi change from becoming a ritual scheduling error.

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