FD mark
FlatlineDynamics
UTC--:--:--
ZONEUTC
FD–CHRCHRONOS · TIME REFERENCE STATION
STN
LIVE
STATIONS · WLD-CLK
SFOSAN FRANCISCOUTC-07 · NIGHT
01:31
JFKNEW YORKUTC-04 · NIGHT
04:31
LHRLONDONUTC+01 · WORK HRS
09:31
DXBDUBAIUTC+04 · WORK HRS
12:31
HNDTOKYOUTC+09 · WORK HRS
17:31
SYDSYDNEYUTC+10 · OFF-HRS
18:31
HELIOS · LUNA
DAYLIGHT15h 52m
ASTRO DAWN01:30NAUTICAL03:19CIVIL04:19↑ SUNRISE05:02SOLAR NOON12:58↓ SUNSET20:54CIVIL21:37NAUTICAL22:37ASTRO DUSK00:26
WAXING CRESCENT
ILLUM 22.3%
AGE 4.6d
SYNODIC 29.53d
PRIMARY · LONDON / LONDON
DAYTHURSDAY
DATEMAY 21
WKW21
JD141
Q · YEARQ2 · 2026
DAY GLASS · 24H RADIAL
000306091215182124H09:31:39LONDON
KEY
ASTRO
NAUTICAL
CIVIL
DAYLIGHT
NOW
SUN
MOON
BCD · HH MM SS
0
8
3
1
3
9
ORBITAL · CYCLE PROGRESS
DAY35.53%
WEEK47.9%
MONTH65.7%
QUARTERQ2 · 55.3%
YEAR2026 · 38.45%
ALT FORMATS · CHRONO-FMT
UNIX EPOCHSECONDS SINCE 1970-01-01
1 779 352 299
ISO 8601 / ZSTANDARD INSTANT
2026-05-21T08:31:39Z
SWATCH BEATINTERNET TIME · BMT
@396.98
SIDEREALLOCAL · STARS NOT SUN
00:27:09
HEX TIMEDAY AS 16-BIT FRAC
.5AF5
DECIMAL10h · 100m · 100s
3.55.31
STOPWATCH · CHRONO-T
00:00:00.00
TIMER · CHRONO-D
25:00
COUNTDOWN
COUNTDOWN · T-MINUS
NEXT HOUR
T−00:28:20
EOD · 17:00
T−08:28:20
MIDNIGHT
T−15:28:20
WEEKEND
T−1d 15:28:20
END OF MONTH
T−10d 15:28:20
END OF YEAR
T−224d 15:28:20
◆ATOMIC ANCHOR · CESIUM-133 · 9,192,631,770 Hz◆LEAP SECONDS SINCE 1972 · 27◆MEAN SIDEREAL DAY · 23h 56m 04.0905s◆EARTH ROTATION · 1670 KM/H @ EQUATOR◆SOLAR DAY · 86400.002s NOMINAL◆CURRENT BMT @397 · UTC+1 SWATCH REFERENCE◆ISO 8601 RFC 3339 · 2026-05-21T08:31:39.321Z◆J2000 EPOCH · 2000-01-01 12:00 TT◆UNIX EPOCH · 1970-01-01 00:00:00 Z◆THE LINE STARTS HERE · FLATLINE DYNAMICS · FD-CHRONOS◆TAI−UTC · +37s · LAST LEAP 2016-12-31◆GPS CONSTELLATION · 31 ACTIVE SVs · 6 PLANES◆ATOMIC ANCHOR · CESIUM-133 · 9,192,631,770 Hz◆LEAP SECONDS SINCE 1972 · 27◆MEAN SIDEREAL DAY · 23h 56m 04.0905s◆EARTH ROTATION · 1670 KM/H @ EQUATOR◆SOLAR DAY · 86400.002s NOMINAL◆CURRENT BMT @397 · UTC+1 SWATCH REFERENCE◆ISO 8601 RFC 3339 · 2026-05-21T08:31:39.321Z◆J2000 EPOCH · 2000-01-01 12:00 TT◆UNIX EPOCH · 1970-01-01 00:00:00 Z◆THE LINE STARTS HERE · FLATLINE DYNAMICS · FD-CHRONOS◆TAI−UTC · +37s · LAST LEAP 2016-12-31◆GPS CONSTELLATION · 31 ACTIVE SVs · 6 PLANES◆ATOMIC ANCHOR · CESIUM-133 · 9,192,631,770 Hz◆LEAP SECONDS SINCE 1972 · 27◆MEAN SIDEREAL DAY · 23h 56m 04.0905s◆EARTH ROTATION · 1670 KM/H @ EQUATOR◆SOLAR DAY · 86400.002s NOMINAL◆CURRENT BMT @397 · UTC+1 SWATCH REFERENCE◆ISO 8601 RFC 3339 · 2026-05-21T08:31:39.321Z◆J2000 EPOCH · 2000-01-01 12:00 TT◆UNIX EPOCH · 1970-01-01 00:00:00 Z◆THE LINE STARTS HERE · FLATLINE DYNAMICS · FD-CHRONOS◆TAI−UTC · +37s · LAST LEAP 2016-12-31◆GPS CONSTELLATION · 31 ACTIVE SVs · 6 PLANES
FD · CHRONOS|UTC REFERENCE|STN · LHR · LONDON
BUILD 2026