Accuracy record

This exists because provenance is the product. Anyone can publish a number. The claim worth making is that a number was read from the instrument that creates it, on a date, and is re-checked — and that claim is only worth anything if we also publish what we got wrong.

Findings come from reading primary sources, not from comparing one aggregator against another. Where a discrepancy could not be reproduced from a public document, it is not listed. We name instruments, not vendors.

Belize — public holidays do NOT all shift to Monday

Commonly published: That Belize holidays falling on a weekday other than Monday are observed on the following Monday, applied as a blanket rule. This appears on Wikipedia and is reproduced by multiple commercial holiday APIs and calendar libraries.

What the source actually says: There is no such blanket rule. Checking six consecutive official notices, the dates gazetted do not follow it: holidays are listed on their actual dates in years where the supposed rule would have moved them. The rule is a plausible-sounding generalisation that the primary source contradicts.

Instrument: Belize Statutory Instruments declaring public and bank holidays, read across six successive years rather than one

Check it yourself: Take any year's Belize public-holiday Statutory Instrument and compare the gazetted dates against what the Monday rule would predict. They diverge. One year could be an exception; six is a refuted rule.

Malta — 5% is not the corporate tax rate

Commonly published: That Malta's effective corporate tax rate is 5%, often stated flatly as though it were the rate a company pays.

What the source actually says: The statutory rate is 35% and it is genuinely paid by the company. Under full imputation, shareholders receiving distributions from specified tax accounts may then claim a REFUND — commonly six-sevenths on active trading income, giving a 5% net outcome, or five-sevenths on passive interest and royalties, giving 10%. Those are shareholder-level outcomes claimed after distribution, not the corporate rate. A payroll or provisioning calculation using 5% as the company's rate is wrong by 30 points.

Instrument: Income Tax Act, Cap. 123, read with the Income Tax Management Act

Check it yourself: Look for who claims the refund. If it is the shareholder and only after a distribution, it is not the company's tax rate.

Slovenia — the '7% minimum effective corporate rate' is out of date

Commonly published: That Slovenia has a minimum effective corporate tax rate of about 7%.

What the source actually says: The rule is a 63% cap on aggregate reductions of the tax base (ZDDPO-2 Art 59.a), leaving a minimum taxable base of 37%. 7.03% was 19% × 37% — correct only while the headline rate was 19%. The rate has been 22% since 2024, so the figure is 8.14%. Separately, the 22% is not in ZDDPO-2 at all: Art 60 still reads 19%, and the 22% is an override in ZORZFS Art 64 enumerated for 2024–2028 only, reverting to 19% for tax year 2029.

Instrument: ZDDPO-2 Arts 59.a and 60; ZORZFS Art 64 (Uradni list RS 131/2023)

Check it yourself: Multiply the current headline rate by 37%. If a published 'minimum effective rate' does not move when the headline rate moves, it is stale.

Cyprus — the late-payment law is N. 123(I)/2012, not 73(I)/2012

Commonly published: That Cyprus transposed the Late Payment Directive by Law 73(I)/2012.

What the source actually says: 73(I)/2003 was the repealed predecessor, transposing the earlier Directive 2000/35/EC. The instrument in force is N. 123(I)/2012 as amended by N. 227(I)/2022. Citing the repealed law points a reader at superseded payment terms.

Instrument: Ν. 123(Ι)/2012 as amended by Ν. 227(Ι)/2022

Check it yourself: Check which Directive the cited law transposes. 2000/35/EC means you have the repealed one.

Slovenia — payment terms are not '30 days by default, 60 by agreement'

Commonly published: That Slovenian B2B payment terms default to 30 days and may be extended to 60 by agreement.

What the source actually says: Three distinct rules are being collapsed into one. The B2B cap is 60 days by ordinary agreement (ZPreZP-1 Art 10(1)); beyond 60 days requires writing and must not be grossly unfair (Art 10(2)); 30 days is the gap-filler when nothing was agreed (Art 12), and separately the cap where the debtor is a public authority (Art 11(1)).

Instrument: Zakon o preprečevanju zamud pri plačilih (ZPreZP-1), Uradni list RS 57/2012

Check it yourself: Read Arts 10, 11 and 12 together. They answer three different questions.

Luxembourg — 3% is the broad rate, 8% is the narrow one

Commonly published: An assumption, carried over from how most member states are structured, that the higher reduced rate covers the essentials basket.

What the source actually says: Luxembourg inverts the usual pattern. The 3% super-reduced rate carries food, non-alcoholic drinks, books, pharmaceuticals, hotels, restaurants and passenger transport. The 8% rate is narrow: hairdressing, gas and electricity, bicycle and shoe repair, cleaning. Applying 8% to food would overcharge by five points.

Instrument: Loi modifiée du 12 février 1979 concernant la taxe sur la valeur ajoutée

Check it yourself: Look up which annex food sits in, rather than assuming the higher reduced rate is the general one.

Colombia — we were missing a holiday created mid-year

What was wrong: Ley 2578/2026 created a public holiday on Monday 13 July 2026, effective on promulgation. We had served Colombia's 2026 calendar without it. Confirmed observed by the Cámara de Representantes. A working-day count spanning that date would have been one day out.

Instrument: Ley 2578/2026

Check it yourself: Compare our /v1/co/public-holidays against the law's promulgation date.

Namibia — we were missing Genocide Remembrance Day

What was wrong: 28 May was declared by Proclamation 19/2024 (Government Gazette 8373). We had not carried it. Same class of failure as Colombia: a holiday created by an instrument issued after we first built the calendar.

Instrument: Proclamation 19/2024, Government Gazette 8373

Check it yourself: Compare our /v1/na/public-holidays against the proclamation.

Angola — we modelled a repealed article

What was wrong: We were missing 23 March and were applying the pre-2018 Artigo 6.º weekend-transfer rule, which had been amended. Two errors compounding: a missing day, and a transfer rule that moved other days incorrectly.

Instrument: Lei that amended Artigo 6.º (post-2018 text)

Check it yourself: Compare our /v1/ao/public-holidays against the consolidated law currently in force.

Papua New Guinea — we added two days that do not exist

What was wrong: Building PNG's 2027 calendar we added Somare Remembrance Day and Easter Sunday. Neither is statutory: the Remembrance observances rest on one-off s.5 declarations with no recurring basis, and s.1(1)(b) covers only Good Friday and the following Saturday and Monday. Caught by a cross-year name-set comparison against our own 2026 data and removed.

Instrument: Public Holidays Act (PNG), ss. 1(1)(b) and 5

Check it yourself: Read s.1(1)(b). Easter Sunday is not in it.

We returned HTTP 500 on two countries for part of a day

What was wrong: A guard added to stop working-days selling wrong answers past our calendar coverage did not account for holiday entries with a deliberately null date (ungazetted placeholders). Sorting put null last and the coverage computation threw. Trinidad and Guyana returned 500 until it was fixed. The guard itself was correct and necessary; the null-handling was not.

Instrument: (internal — commit 8087e21 through d4dc14b)

Check it yourself: POST /v1/answers/working-days for tt or gy. It now refuses or answers, never 500s.