Every public holiday on record for 2023-01, by country.
| Holiday | Country | Date | Weekday | |
|---|---|---|---|---|
| Confraternização Universal | Brazil | 2023-01-01 | Sunday | detail |
| New Year's Day | Canada | 2023-01-01 | Sunday | detail |
| 元旦 | China | 2023-01-01 | Sunday | detail |
| Año Nuevo | Colombia | 2023-01-01 | Sunday | detail |
| Nova Godina | Croatia | 2023-01-01 | Sunday | detail |
| Πρωτοχρονιά | Cyprus | 2023-01-01 | Sunday | detail |
| Den obnovy samostatného českého státu; Nový rok | Czechia | 2023-01-01 | Sunday | detail |
| Nytårsdag | Denmark | 2023-01-01 | Sunday | detail |
| uusaasta | Estonia | 2023-01-01 | Sunday | detail |
| Uudenvuodenpäivä | Finland | 2023-01-01 | Sunday | detail |
| Jour de l'an | France | 2023-01-01 | Sunday | detail |
| Neujahr | Germany | 2023-01-01 | Sunday | detail |
| Πρωτοχρονιά | Greece | 2023-01-01 | Sunday | detail |
| Újév | Hungary | 2023-01-01 | Sunday | detail |
| Nýársdagur | Iceland | 2023-01-01 | Sunday | detail |
| Tahun Baru Masehi | Indonesia | 2023-01-01 | Sunday | detail |
| Lá Caille | Ireland | 2023-01-01 | Sunday | detail |
| Capodanno | Italy | 2023-01-01 | Sunday | detail |
| Jaungada diena | Latvia | 2023-01-01 | Sunday | detail |
| Naujieji metai | Lithuania | 2023-01-01 | Sunday | detail |
| Neijoerschdag | Luxembourg | 2023-01-01 | Sunday | detail |
| Ras l' âm | Morocco | 2023-01-01 | Sunday | detail |
| Nieuwjaarsdag | Netherlands | 2023-01-01 | Sunday | detail |
| New Year's Day | Nigeria | 2023-01-01 | Sunday | detail |
| Første nyttårsdag | Norway | 2023-01-01 | Sunday | detail |
| Año Nuevo | Peru | 2023-01-01 | Sunday | detail |
| Bagong Taon | Philippines | 2023-01-01 | Sunday | detail |
| Nowy Rok | Poland | 2023-01-01 | Sunday | detail |
| Ano Novo | Portugal | 2023-01-01 | Sunday | detail |
| Anul Nou | Romania | 2023-01-01 | Sunday | detail |
| novo leto | Slovenia | 2023-01-01 | Sunday | detail |
| 새해 | South Korea | 2023-01-01 | Sunday | detail |
| Año Nuevo | Spain | 2023-01-01 | Sunday | detail |
| Nyårsdagen | Sweden | 2023-01-01 | Sunday | detail |
| Neujahr | Switzerland | 2023-01-01 | Sunday | detail |
| Yılbaşı | Turkey | 2023-01-01 | Sunday | detail |
| Новий Рік | Ukraine | 2023-01-01 | Sunday | detail |
| Tết dương lịch | Vietnam | 2023-01-01 | Sunday | detail |
| Нова година | Bulgaria | 2023-01-02 | Monday | detail |
| Año Nuevo | Chile | 2023-01-02 | Monday | detail |
| 元日 | Japan | 2023-01-02 | Monday | detail |
| New Year's Day | Kenya | 2023-01-02 | Monday | detail |
| Año Nuevo | Mexico | 2023-01-02 | Monday | detail |
| New Year's Day | New Zealand | 2023-01-02 | Monday | detail |
| Nova Godina | Serbia | 2023-01-02 | Monday | detail |
| New Year's Day | Singapore | 2023-01-02 | Monday | detail |
| novo leto | Slovenia | 2023-01-02 | Monday | detail |
| New Year's Day | South Africa | 2023-01-02 | Monday | detail |
| New Year's Day | United Kingdom | 2023-01-02 | Monday | detail |
| New Year's Day | United States | 2023-01-02 | Monday | detail |
| Nova Godina | Serbia | 2023-01-03 | Tuesday | detail |
| 2 January | United Kingdom | 2023-01-03 | Tuesday | detail |
| Takdim watikat al-istiqlal | Morocco | 2023-01-11 | Wednesday | detail |
| Australia Day | Australia | 2023-01-26 | Thursday | detail |