All minutes are 60 seconds long. Leap seconds are "smeared" so that no leapsecond table is needed for interpretation, using a24-hour linearsmear.

The range is from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59.999999999Z. Byrestricting to that range, we ensure that we can convert to and fromRFC3339 date strings.

= Examples

Example 1: Compute Timestamp from POSIXtime().

Timestamp timestamp;timestamp.set_seconds(time(NULL));timestamp.set_nanos(0);

Example 2: Compute Timestamp from POSIXgettimeofday().

struct timeval tv;gettimeofday(&tv, NULL);Timestamp timestamp;timestamp.set_seconds(tv.tv_sec);timestamp.set_nanos(tv.tv_usec * 1000);

Example 3: Compute Timestamp from Win32GetSystemTimeAsFileTime().

FILETIME ft;GetSystemTimeAsFileTime(&ft);UINT64 ticks = (((UINT64)ft.dwHighDateTime) << 32) | ft.dwLowDateTime;// A Windows tick is 100 nanoseconds. Windows epoch 1601-01-01T00:00:00Z// is 11644473600 seconds before Unix epoch 1970-01-01T00:00:00Z.Timestamp timestamp;timestamp.set_seconds((INT64) ((ticks / 10000000) - 11644473600LL));timestamp.set_nanos((INT32) ((ticks % 10000000) * 100));

Example 4: Compute Timestamp from JavaSystem.currentTimeMillis().

long millis = System.currentTimeMillis();Timestamp timestamp = Timestamp.newBuilder().setSeconds(millis / 1000)    .setNanos((int) ((millis % 1000) * 1000000)).build();

Example 5: Compute Timestamp from current time in Python.

timestamp = Timestamp()timestamp.GetCurrentTime()

= JSON Mapping

In JSON format, the Timestamp type is encoded as a string in theRFC 3339 format. That is, theformat is "{year}-{month}-{day}T{hour}:{min}:{sec}[.{frac_sec}]Z"where {year} is always expressed using four digits while {month}, {day},{hour}, {min}, and {sec} are zero-padded to two digits each. The fractionalseconds, which can go up to 9 digits (i.e. up to 1 nanosecond resolution),are optional. The "Z" suffix indicates the timezone ("UTC"); the timezoneis required. A proto3 JSON serializer should always use UTC (as indicated by"Z") when printing the Timestamp type and a proto3 JSON parser should beable to accept both UTC and other timezones (as indicated by an offset).

For example, "2017-01-15T01:30:15.01Z" encodes 15.01 seconds past01:30 UTC on January 15, 2017.

In JavaScript, one can convert a Date object to this format using thestandardtoISOString()method. In Python, a standarddatetime.datetime object can be convertedto this format usingstrftime withthe time format spec '%Y-%m-%dT%H:%M:%S.%fZ'. Likewise, in Java, one can usethe Joda Time'sISODateTimeFormat.dateTime() to obtain a formatter capable of generating timestamps in this format.

Inherits

• Object

• (Integer) — Non-negative fractions of a second at nanosecond resolution. Negativesecond values with fractions must still have non-negative nanos valuesthat count forward in time. Must be from 0 to 999,999,999inclusive.

• value (Integer) — Non-negative fractions of a second at nanosecond resolution. Negativesecond values with fractions must still have non-negative nanos valuesthat count forward in time. Must be from 0 to 999,999,999inclusive.

• (Integer) — Non-negative fractions of a second at nanosecond resolution. Negativesecond values with fractions must still have non-negative nanos valuesthat count forward in time. Must be from 0 to 999,999,999inclusive.

• (Integer) — Represents seconds of UTC time since Unix epoch1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to9999-12-31T23:59:59Z inclusive.

• value (Integer) — Represents seconds of UTC time since Unix epoch1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to9999-12-31T23:59:59Z inclusive.

• (Integer) — Represents seconds of UTC time since Unix epoch1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to9999-12-31T23:59:59Z inclusive.