Summer break, also known as summer vacation, is a school holiday period during the summer months, typically occurring between school years. The exact timing and length of the summer break vary widely by country and region:

• In many countries such as the United States, summer break generally lasts about two to three months, with students finishing the school year in late May or early June and starting the new year in mid to late August or early September.
• In Spain, the school year usually finishes in mid to late June and begins again in early to mid-September. Summer holidays in some parts of Spain can start around mid-June and last until mid to late July or even August depending on the region or school type.
• In countries like Canada, summer vacation usually spans from the last week of June to early September.
• Some countries have shorter breaks: for example, in Germany the summer vacation lasts about six weeks and rotates among states mostly from late June or July to August.
• In Asian countries like India, summer breaks vary by region but generally last 1.5 to 2 months, from mid-April to early July depending on the region.
• Other countries have different timings; for example, in Bolivia and Brazil, summer vacation runs from early December to early February, adapting to their Southern Hemisphere seasons.

So, the precise dates for summer break depend largely on the country and local school calendars. Typically, it falls around late May to early September for Northern Hemisphere countries, and December to February for Southern Hemisphere countries.