M Start of Minute (0.1 s)
R RF Transmission via secondary antenna
A1 Announcement of a change in daylight saving
Z1, Z2 Time zone identification
Z1, Z2 = 0, 1: Daylight saving disabled
Z1, Z2 = 1, 0: Daylight saving enabled
A2 Announcement of a leap second
S Start of time code information
P1, P2, P3 Even parity bits
0
10
20
30
40
50
R
M
1
4
2
1
2
0
1
0
8
4
2
1
P2
02
01
8
4
2
1
2
4
8
10
1
2
4
8
1
0
2
0
40
80
3
P
A1
Z1
Z
2
A2
S
1
2
4
8
10
2
0
4
0
1P
Minute
(reserved)
Hour
Day of Month
Day of Week
Year of the Century
Month of Year