const time.RFC3339Nano

21 uses

	time (current package)
		format.go#L120: 	RFC3339Nano = "2006-01-02T15:04:05.999999999Z07:00"
		format.go#L660: 	case RFC3339Nano:
		format.go#L1025: 	if layout == RFC3339 || layout == RFC3339Nano {
		format.go#L1040: 	if layout == RFC3339 || layout == RFC3339Nano {
		time.go#L1588: 	b := make([]byte, 0, len(RFC3339Nano)+len(`""`))
		time.go#L1635: 	return t.appendTo(make([]byte, 0, len(RFC3339Nano)), "Time.MarshalText: ")

	database/sql
		convert.go#L287: 			*d = s.Format(time.RFC3339Nano)
		convert.go#L293: 			*d = s.AppendFormat(make([]byte, 0, len(time.RFC3339Nano)), time.RFC3339Nano)
		convert.go#L299: 			*d = rows.setrawbuf(s.AppendFormat(rows.rawbuf(), time.RFC3339Nano))

	github.com/jackc/pgx/v5/pgtype
		timestamp.go#L117: 		tim, err := time.Parse(time.RFC3339Nano, tss)
		timestamp.go#L129: 			*s, time.RFC3339Nano, jsonISO8601, err)
		timestamptz.go#L92: 		s = tstz.Time.Format(time.RFC3339Nano)
		timestamptz.go#L122: 		tim, err := time.Parse(time.RFC3339Nano, *s)

	go.pact.im/x/zapjournal
		encoder.go#L204: 	e.buf = value.AppendFormat(e.buf, time.RFC3339Nano)
		json.go#L179: 	e.setBuf(v.AppendFormat(e.buf(), time.RFC3339Nano))

	go.uber.org/zap/zapcore
		encoder.go#L159: 	encodeTimeLayout(t, time.RFC3339Nano, enc)

	google.golang.org/protobuf/encoding/protojson
		well_known_types.go#L803: 	t, err := time.Parse(time.RFC3339Nano, s)

	log/slog
		handler.go#L630: 	b = t.AppendFormat(b, time.RFC3339Nano)
		json_handler.go#L100: 	*s.buf = t.AppendFormat(*s.buf, time.RFC3339Nano)

	net/http
		transport.go#L2894: 		logf(time.Now().Format(time.RFC3339Nano)+": "+format, args...)

The pages are generated with Golds v0.7.6. (GOOS=linux GOARCH=amd64)