Julian Day Conversion in Google Sheets & Excel

What this pulls

Convert dates by the row. Turns a Gregorian date into its Julian Day Number down a column — Google Sheets or Excel.

It's one of 250+ live sources you reach with a single =VERVE() function — served from APIVerve's production data engine, billed at 1 credit per resolved cell, and refreshed on whatever cadence you set. No API keys to wrangle, no scripts, no exports.

See it in a cell

A real example — the input you type, and the values you can pull from it. Click any cell to see the formula behind it.

julianday.xlsxsample data

B2fx=VERVE("julianday", A2, "field", "gregorian")

Date

Gregorian

Julian Day Number

Modified Julian Date

Day Of Week

2024-03-15

2024-03-15

2460385

60384.5

Friday

click any cell to see its formula1 credit / cell

Ways to use it

One value per row

Fill =VERVE("julianday", "2024-03-15", "field", "gregorian") down a column and Julian Day Conversion returns a result for every row — a batch of live values in a single drag, no code.

Enrich data in place

Add Julian Day Conversion beside a table you already have to append its output right where your data lives, then sort, filter, or chart on it.

Stays fresh on its own

Set the sheet to refresh on a schedule and the julian day conversion values keep themselves current without anyone re-typing.

Use it in your sheet

The same function works in both apps — install once, sign in with your key, and type it into any cell.

Google SheetsAdd-on

Install from the Workspace Marketplace, then drop the formula into a cell. Autocomplete suggests the source and its fields.

=VERVE("julianday", "2024-03-15", "field", "gregorian")

Microsoft ExcelAdd-in

Same source, same arguments, same key — in Excel on desktop, the web, or mobile. Excel namespaces it as VERVE.CALL. Drag to fill a whole column.

=VERVE.CALL("julianday", "2024-03-15", "field", "gregorian")

Fields you can pull

Add a field name as the last argument to land just that value in the cell.

Week Number
=VERVE("julianday", "2024-03-15", "field", "weekNumber")
Day Of Year
=VERVE("julianday", "2024-03-15", "field", "dayOfYear")
Days From TodayPremium
=VERVE("julianday", "2024-03-15", "field", "daysFromToday")
Gregorian
=VERVE("julianday", "2024-03-15", "field", "gregorian")
Julian Day Number
=VERVE("julianday", "2024-03-15", "field", "julianDayNumber")
Modified Julian Date
=VERVE("julianday", "2024-03-15", "field", "modifiedJulianDate")
Day Of Week
=VERVE("julianday", "2024-03-15", "field", "dayOfWeek")

Premium marks data included on paid plans. On the Free plan a marked field is withheld and a marked input is ignored — either way the cell reads #PREMIUM(name) instead of a value, so a gated answer can never be mistaken for a real one. Everything unmarked works on every plan. Compare plans

Julian Day Conversion, answered

Everything you need to wire it into a sheet.

How do I pull Julian Day Conversion into Google Sheets?

Install the VerveSheets add-on, sign in once with your key, and type =VERVE("julianday", "2024-03-15", "field", "weekNumber") into any cell. The "field" argument names the value you want back, so the cell resolves to a single number or string you can chart, sort, or feed into another formula.

What data can I pull from Julian Day Conversion?

Julian Day Conversion returns weekNumber, dayOfYear, gregorian, julianDayNumber and modifiedJulianDate, plus 1 more — name any one of them as the "field" argument and that value lands in the cell. Leave the field out and the whole record spills into a two-column table instead.

Which Julian Day Conversion fields need a paid plan?

daysFromToday is included from the Starter plan up. On the Free plan the cell returns #PREMIUM(field) rather than a wrong or empty value, so it's always obvious which one to upgrade for. Every other field works on Free.

Can I fill a whole column of Julian Day Conversion at once?

Yes. Put your date values down a column and point the formula at the range — A2:A50 instead of A2 — and one call returns a value for every row. Dragging the formula down works too, but the range form is a single billed call per column rather than one per cell.

How many credits does each Julian Day Conversion cell cost?

Each resolved cell costs 1 credit. A cell only re-bills when it actually refreshes, so a sheet you aren't touching doesn't keep charging.

Does Julian Day Conversion work in Excel as well as Google Sheets?

Yes — same arguments, same key, same fields. Excel namespaces custom functions, so the call is =VERVE.CALL() there and =VERVE() in Google Sheets; nothing else about it changes.

Julian Day Conversion

One value per row

Enrich data in place

Stays fresh on its own

Julian Day Conversion, answered

Put Julian Day Conversion in your next spreadsheet. Add the extension, paste the formula, and the cell keeps itself current.

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