This a somewhat crude, proof-of-concept, not robust, decoder for the timesignal broadcast by TDF as phasemodulation on France Inter's 162 kHz carrier.
It is to be used by first opening http://websdr.ewi.utwente.nl:8901/ in one browser tab, tuning to 162 kHz CW, then opening this page in a second tab, and then having some patience.
I've tested it under Firefox, and it may also work under Chrome and Opera; other browsers lack the necessary communication between tabs.

Comments about this page can be sent to pa3fwm@websdr.org.

Status: Connecting to WebSDR tab

Incoming signals (phase of 162 kHz carrier):

Incoming bits:

Bits received during previous minute: 


  | |                     | | | | | | | | -------------   -----------   ----------- ----- --------- ---------------
  | | tomorrow publ.hol.--' | | | C C | |    minutes         hours          day    weekday  month        year
  | | today public holiday -' | | E E | |                                                                    
  | |       to be ignored ----' | S T | `--- unused, always 1
  | | summer time announcement--' T   `----- unused, always 0
  | |
  | `---- negative leap second announcement
  `------ positive leap second announcement

Information about the signal and the individual bits can be found on Wikipedia, but is not quite correct w.r.t. to the leap second bits; French standard NF C 90-002 gives all the details, but doesn't seem to be available online.