If a search gives you three dates for the same name, the answer is usually three different associations, not a broken calendar. One date may belong to a national name list, another to a saint’s feast, and a third to a different spelling or local tradition. A person’s own chosen day can differ again.
To find the date that matters, keep the calendar attached to the result. “Anna — July 26 in the Latvian traditional calendar” tells you something useful. “Anna — July 26” alone invites a false universal rule.
Five reasons dates multiply
Countries maintain different lists. Each list has its own history and editors. A Swedish name-day list distinguishes the names in its principal namnlängd from related spellings that may be celebrated on the same date. Latvia has both a traditional list and an expanded one. A date from either country needs its country and list label.
A name may belong to several saints or events. People with a shared first name can have different patrons. A religious calendar may contain more than one saint of that name, and not all families identify with the same one.
Spellings are not identical records. Anna, Ana, Anne and Ance may be related, but the connection depends on the calendar. A search tool can help find variants; it should still show whether the spelling is an exact entry or a related form. In the Latvian traditional list, July 26 includes Anna, Ance and Annija; the expanded line contains more forms. That does not make every form an entry in the principal list.
Some feasts move. The Greek Orthodox feast of St George normally appears under April 23, but the observance moves it to Bright Monday if that date falls on or before Pascha. A date must therefore sometimes include a year and a church calendar, not just a month and day.
A family may choose one of several valid days. In Polish imieniny custom, that a Polish name can appear on multiple dates and a person commonly chooses one to keep. Seeing a name in today’s calendar does not prove it is that person’s celebration.
A practical decision tree
First, write down the full spelling. Second, identify the country or religious tradition the person means. Third, choose the specific calendar. Fourth, separate exact entries from suggested variants. Fifth, if more than one day remains, ask which date the person celebrates. Record the answer in your own calendar with the tradition in the event title.
Consider a Polish colleague called Anna. A general search page may show several Anna dates from across Europe. Instead of picking the first search result, ask “Do you celebrate imieniny, and which date do you use?” That is a natural question, and it prevents an awkward premature greeting. If the colleague follows Latvia’s traditional list, July 26 is documented there. If she does not, the Latvian result is simply not her answer.
Which date should you put in a reminder?
Use the person’s preference. If you cannot ask, the date from the tradition they are closest to is a reasonable lead, but keep it as a lead. A reminder title such as “Anna — Latvian name day (confirm with Anna)” is more useful than a context-free “Anna day.” Once they tell you, remove the question mark and enjoy remembering it next year.
You can search the Latvian and Slovak calendars here or browse other calendar guides to understand how a date was assigned. The aim is to help you choose the calendar the person recognizes.
The Nicholas comparison shows how exact spellings and countries can produce different records. For names used together, see compound names; for a secondary given name, see middle-name occasions.