Struct tm
struct tm is a C standard library structure type representing broken-down calendar-time components such as seconds, minutes, days, months, and years.
Modern C
struct tm is the C standard library structure type for decomposed calendar-time components such as seconds, days, months, and years.
- How it is used
- Represents calendar dates as named components for initialization, member access, and time-library conversion.
- How deep it goes
- Works through designated initialization, member counting rules, omitted-member defaults, consistency, and mktime normalization.
- Examples
- Uses a 3 April 2019 initializer and a leap-year-aware function that computes tm_yday.
- What you can do after
- Operate/configure it with designated initializers and mktime to construct and normalize calendar-time values.
Modern C, Third Edition
struct tm is the C standard-library structure type for representing broken-down calendar time components such as seconds, days, months, and years.
- How it is used
- Represents human-oriented calendar times and supplies structured fields for date arithmetic, conversion, and formatting.
- How deep it goes
- Defines members, encodings, initialization, consistency, and mktime normalization, but does not develop complete time-zone or formatting behavior.
- Examples
- Uses a 2019 date initializer, member-based year printing, and a day-of-year calculation that accounts for leap years.
- What you can do after
- Apply it via <time.h> to construct, inspect, normalize, convert, and format calendar-time values.
Related concepts
- time.hproduced by · time.h is the C standard header that declares facilities for representing, querying, and manipulating calendar and processor time.
- mktimeused by · mktime is a C standard-library function that converts a local broken-down calendar time to time_t while normalizing its fields.
- structkind of · A struct is a composite data type or structure that groups related fields or values into a single unit.
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