More timezone tweaks.

html.c

@@ -4369,7 +4369,7 @@ int html_post_handler(const xs_dict *req, const char *q_path,
                 if (t != 0) {
                     const char *tz = xs_dict_get_def(snac.config, "tz", "UTC");
 
-                    t += xs_tz_offset(tz);
+                    t -= xs_tz_offset(tz);
 
                     xs *iso_date = xs_str_iso_date(t);
                     msg = xs_dict_set(msg, "published", iso_date);

xs_time.h

@@ -116,7 +116,36 @@ struct {
     const char *tz; /* timezone name */
     float h_offset; /* hour offset */
 } xs_tz[] = {
-    { "UTC",      0 },
+    { "UTC",                                     0 },
+    { "WET (Western European Time)",             0 },
+    { "WEST (Western European Summer Time)",     1 },
+    { "CET (Central European Time)",             1 },
+    { "CEST (Central European Summer Time)",     2 },
+    { "EET (Eastern European Time)",             2 },
+    { "EEST (Eastern European Summer Time)",     3 },
+    { "MSK (Moskow Time Zone)",                  3 },
+    { "EST (Eastern Time Zone)",                 -5 },
+    { "AST (Atlantic Time Zone)",                -4 },
+    { "ADT (Atlantic Daylight Time Zone)",       -3 },
+    { "CST (Central Time Zone)",                 -6 },
+    { "CDT (Central Daylight Time Zone)",        -5 },
+    { "MST (Mountain Time Zone)",                -7 },
+    { "MDT (Mountain Daylight Time Zone)",       -6 },
+    { "PST (Pacific Time Zone)",                 -8 },
+    { "PDT (Pacific Daylight Time Zone)",        -7 },
+    { "AKST (Alaska Time Zone)",                 -9 },
+    { "AKDT (Alaska Daylight Time Zone)",        -8 },
+    { "China Time Zone",                         8 },
+    { "IST (Israel Standard Time)",              2 },
+    { "IDT (Israel Daylight Standard Time)",     3 },
+    { "WITA (Western Indonesia Time)",           8 },
+    { "AWST (Australian Western Time)",          8 },
+    { "ACST (Australian Eastern Time)",          9.5 },
+    { "ACDT (Australian Daylight Eastern Time)", 10.5 },
+    { "AEST (Australian Eastern Time)",          10 },
+    { "AEDT (Australian Daylight Eastern Time)", 11 },
+    { "NZST (New Zealand Time)",                 12 },
+    { "NZDT (New Zealand Daylight Time)",        13 },
     { "GMT",      0 },
     { "GMT+1",    -1 },
     { "GMT+2",    -2 },
@@ -144,13 +173,6 @@ struct {
     { "GMT-12",   12 },
     { "GMT-13",   13 },
     { "GMT-14",   14 },
-    { "GMT-15",   15 },
-    { "WET",      0 },
-    { "CET",      -1 },
-    { "AST",      -4 },
-    { "CST",      -6 },
-    { "MST",      -7 },
-    { "PST",      -8 },
     { NULL,       0 }
 };