An AP configured with hostapd's time_advertisement=2 includes the
IEEE 802.11v Time Advertisement and Time Zone elements in its beacons,
but iw shows them only as unknown IEs, and only with -u.

The Time Zone element is just a POSIX TZ string, so print it verbatim.
For Time Advertisement, print the timing capabilities field and, for
method 2, the UTC time at which the TSF timer was zero:

	Time Advertisement:
		 * timing capabilities: 2
		 * UTC time at TSF 0: 2026-10-19 20:50:45.000
	Time Zone: GMT0BST,M3.5.0/1,M10.5.0

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
---
 ieee80211.h |  2 ++
 scan.c      | 19 +++++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/ieee80211.h b/ieee80211.h
index 2e6b68b..a53fb61 100644
--- a/ieee80211.h
+++ b/ieee80211.h
@@ -78,8 +78,10 @@ enum elem_id {
 	EID_HT_OPERATION		= 61,
 	EID_SECONDARY_CH_OFFSET		= 62,
 	EID_MEASUREMENT_PILOT_TX	= 66,
+	EID_TIME_ADVERTISEMENT		= 69,
 	EID_RM_ENABLED_CAPABILITIES	= 70,
 	EID_OVERLAP_BSS_SCAN_PARAM	= 74,
+	EID_TIME_ZONE			= 98,
 	EID_INTERWORKING		= 107,
 	EID_ADVERTISEMENT		= 108,
 	EID_ROAMING_CONSORTIUM		= 111,
diff --git a/scan.c b/scan.c
index 2b6e904..871f72f 100644
--- a/scan.c
+++ b/scan.c
@@ -1822,6 +1822,22 @@ static void print_ie(const struct ie_print *p, const uint8_t type, uint8_t len,
 	p->print(type, len, data, ctx);
 }
 
+static void print_time_adv(const uint8_t type, uint8_t len, const uint8_t *data,
+			   const struct ie_context *ctx)
+{
+	printf("\n");
+	printf("\t\t * timing capabilities: %d\n", data[0]);
+
+	/* Time Value, Time Error and Time Update fields are only
+	 * present for timing capabilities value 2 (UTC at TSF 0) */
+	if (data[0] != 2 || len < 17)
+		return;
+
+	printf("\t\t * UTC time at TSF 0: %04d-%02d-%02d %02d:%02d:%02d.%03d\n",
+	       (data[2] << 8) | data[1], data[3], data[4],
+	       data[5], data[6], data[7], (data[9] << 8) | data[8]);
+}
+
 #define PRINT_IGN {		\
 	.name = "IGNORE",	\
 	.print = NULL,		\
@@ -1850,6 +1866,9 @@ static const struct ie_print ieprinters[] = {
 				  print_supp_op_classes, 1, 255, BIT(PRINT_SCAN), },
 	[EID_MEASUREMENT_PILOT_TX] = { "Measurement Pilot Transmission",
 				       print_measurement_pilot_tx, 1, 255, BIT(PRINT_SCAN), },
+	[EID_TIME_ADVERTISEMENT] = { "Time Advertisement", print_time_adv,
+				     1, 255, BIT(PRINT_SCAN), },
+	[EID_TIME_ZONE] = { "Time Zone", print_ssid, 1, 255, BIT(PRINT_SCAN), },
 	[EID_OVERLAP_BSS_SCAN_PARAM] = { "Overlapping BSS scan params",
 					 print_obss_scan_params, 14, 255, BIT(PRINT_SCAN), },
 	[EID_HT_OPERATION] = { "HT operation", print_ht_op, 22, 22, BIT(PRINT_SCAN), },
-- 
2.43.0