diff --git a/package.json b/package.json
index 96e6199..39f9555 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ssf",
-  "version": "0.6.1",
+  "version": "0.6.2",
   "author": "SheetJS",
   "description": "pure-JS library to format data using ECMA-376 spreadsheet Format Codes",
   "keywords": [ "format", "sprintf", "spreadsheet" ],
diff --git a/ssf.js b/ssf.js
index 4ba13c1..fd58447 100644
--- a/ssf.js
+++ b/ssf.js
@@ -5,7 +5,7 @@ var _strrev = function(x) { return String(x).split("").reverse().join("");};
 function fill(c,l) { return new Array(l+1).join(c); }
 function pad(v,d,c){var t=String(v);return t.length>=d?t:(fill(c||0,d-t.length)+t);}
 function rpad(v,d,c){var t=String(v);return t.length>=d?t:(t+fill(c||0,d-t.length));}
-SSF.version = '0.6.1';
+SSF.version = '0.6.2';
 /* Options */
 var opts_fmt = {};
 function fixopts(o){for(var y in opts_fmt) if(o[y]===undefined) o[y]=opts_fmt[y];}
@@ -120,7 +120,7 @@ var parse_date_code = function parse_date_code(v,opts) {
   var dout=[], out={D:date, T:time, u:86400*(v-date)-time}; fixopts(opts = (opts||{}));
   if(opts.date1904) date += 1462;
   if(date > 2958465) return null;
-  if(out.u > .999) {
+  if(out.u > 0.999) {
     out.u = 0;
     if(++time == 86400) { time = 0; ++date; }
   }
@@ -201,13 +201,13 @@ var write_date = function(type, fmt, val) {
 /*jshint +W086 */
 var commaify = function(s) { return _strrev(_strrev(s).replace(/.../g,"$&,")).replace(/^,/,""); };
 var write_num = function(type, fmt, val) {
-  if(type === '(') {
+  if(type === '(' && !fmt.match(/\).*[0#]/)) {
     var ffmt = fmt.replace(/\( */,"").replace(/ \)/,"").replace(/\)/,"");
     if(val >= 0) return write_num('n', ffmt, val);
     return '(' + write_num('n', ffmt, -val) + ')';
   }
   var mul = 0, o;
-  fmt = fmt.replace(/%/g,function(x) { mul++; return ""; });
+  fmt = fmt.replace(/%/g,function() { mul++; return ""; });
   if(mul !== 0) return write_num(type, fmt, val * Math.pow(10,2*mul)) + fill("%",mul);
   fmt = fmt.replace(/(\.0+)(,+)$/g,function($$,$1,$2) { mul=$2.length; return $1; });
   if(mul !== 0) return write_num(type, fmt, val / Math.pow(10,3*mul));
@@ -260,6 +260,18 @@ var write_num = function(type, fmt, val) {
     return val < 0 ? "-" + write_num(type, fmt, -val) : commaify(String(Math.floor(val))) + "." + pad(rr,r[1].length,0);
   }
   if((r = fmt.match(/^#,#*,#0/))) return write_num(type,fmt.replace(/^#,#*,/,""),val);
+  if((r = fmt.match(/^([0#]+)-([0#]+)$/))) {
+    ff = write_num(type, fmt.replace(/-/,""), val);
+    return ff.substr(0,ff.length - r[2].length) + "-" + ff.substr(ff.length-r[2].length);
+  }
+  if((r = fmt.match(/^([0#]+)-([0#]+)-([0#]+)$/))) {
+    ff = write_num(type, fmt.replace(/-/g,""), val);
+    return ff.substr(0,ff.length - r[2].length - r[3].length) + "-" + ff.substr(ff.length-r[2].length - r[3].length, r[2].length) + "-" + ff.substr(ff.length-r[3].length);
+  }
+  if(fmt == "(###) ###-####") {
+    ff = write_num(type, "##########", val);
+    return "(" + ff.substr(0,3) + ") " + ff.substr(3, 3) + "-" + ff.substr(6);
+  }
   if((r = fmt.match(/^([?]+)([ ]?)\/([ ]?)([?]+)/))) {
     rr = Math.min(Math.max(r[1].length, r[4].length),7);
     ff = frac(aval, Math.pow(10,rr)-1, false);
@@ -384,13 +396,13 @@ function eval_fmt(fmt, v, opts, flen) {
   switch(bt) {
     case 0: break;
     case 1:
-      if(dt.u >= .5) { dt.u = 0; ++dt.S; }
-      if(dt.S >= 60) { dt.S = 0; ++dt.M; }
-      if(dt.M >= 60) { dt.M = 0; ++dt.H; }
+      if(dt.u >= 0.5) { dt.u = 0; ++dt.S; }
+      if(dt.S >=  60) { dt.S = 0; ++dt.M; }
+      if(dt.M >=  60) { dt.M = 0; ++dt.H; }
       break;
     case 2:
-      if(dt.u >= .5) { dt.u = 0; ++dt.S; }
-      if(dt.S >= 60) { dt.S = 0; ++dt.M; }
+      if(dt.u >= 0.5) { dt.u = 0; ++dt.S; }
+      if(dt.S >=  60) { dt.S = 0; ++dt.M; }
       break;
   }
   /* replace fields */
@@ -402,7 +414,7 @@ function eval_fmt(fmt, v, opts, flen) {
         out[i].t = 't'; break;
       case 'n': case '(': case '?':
         var jj = i+1;
-        while(out[jj] && ("?D".indexOf(out[jj].t) > -1 || (" t".indexOf(out[jj].t) > -1 && "?t".indexOf((out[jj+1]||{}).t)>-1 && (out[jj+1].t == '?' || out[jj+1].v == '/')) || out[i].t == '(' && (out[jj].t == ')' || out[jj].t == 'n') || out[jj].t == 't' && (out[jj].v == '/' || '$€'.indexOf(out[jj].v) > -1 || (out[jj].v == ' ' && (out[jj+1]||{}).t == '?')))) {
+        while(out[jj] && ("?D".indexOf(out[jj].t) > -1 || (" t".indexOf(out[jj].t) > -1 && "?t".indexOf((out[jj+1]||{}).t)>-1 && (out[jj+1].t == '?' || out[jj+1].v == '/')) || out[i].t == '(' && (")n ".indexOf(out[jj].t) > -1) || out[jj].t == 't' && (out[jj].v == '/' || '$€'.indexOf(out[jj].v) > -1 || (out[jj].v == ' ' && (out[jj+1]||{}).t == '?')))) {
           out[i].v += out[jj].v;
           delete out[jj]; ++jj;
         }
@@ -428,7 +440,29 @@ function choose_fmt(fmt, v, o) {
     default: throw "cannot find right format for |" + fmt + "|";
   }
   if(typeof v !== "number") return [fmt.length, fmt[3]];
-  return [l, v > 0 ? fmt[0] : v < 0 ? fmt[1] : fmt[2]];
+  var ff = v > 0 ? fmt[0] : v < 0 ? fmt[1] : fmt[2];
+  if(fmt[0].match(/\[[=<>]/) || fmt[1].match(/\[[=<>]/)) {
+    var chk = function(v, rr, out) {
+      if(!rr) return null;
+      var found = false;
+      var thresh = Number(rr[2]);
+      switch(rr[1]) {
+        case "=":  if(v == thresh) found = true; break;
+        case ">":  if(v >  thresh) found = true; break;
+        case "<":  if(v <  thresh) found = true; break;
+        case "<>": if(v != thresh) found = true; break;
+        case ">=": if(v >= thresh) found = true; break;
+        case "<=": if(v <= thresh) found = true; break;
+      }
+      return found ? out : null;
+    }
+    var m1 = fmt[0].match(/\[([=<>]*)([-]?\d+)\]/);
+    var m2 = fmt[1].match(/\[([=<>]*)([-]?\d+)\]/);
+    return chk(v, m1, [l, fmt[0]])
+        || chk(v, m2, [l, fmt[1]])
+        || [l, fmt[m1&&m2?2:1]];
+  }
+  return [l, ff];
 }
 var format = function format(fmt,v,o) {
   fixopts(o = (o||{}));
diff --git a/ssf.md b/ssf.md
index 5f40419..5fea3bd 100644
--- a/ssf.md
+++ b/ssf.md
@@ -296,7 +296,7 @@ Date codes beyond 12/31/9999 are invalid:
 Due to floating point issues, correct for subseconds:
 
 ```
-  if(out.u > .999) {
+  if(out.u > 0.999) {
     out.u = 0;
     if(++time == 86400) { time = 0; ++date; }
   }
@@ -360,7 +360,7 @@ var write_num = function(type, fmt, val) {
 For parentheses, explicitly resolve the sign issue:
 
 ```js>tmp/60_number.js
-  if(type === '(') {
+  if(type === '(' && !fmt.match(/\).*[0#]/)) {
     var ffmt = fmt.replace(/\( */,"").replace(/ \)/,"").replace(/\)/,"");
     if(val >= 0) return write_num('n', ffmt, val);
     return '(' + write_num('n', ffmt, -val) + ')';
@@ -371,7 +371,7 @@ Percentage values should be physically shifted:
 
 ```js>tmp/60_number.js
   var mul = 0, o;
-  fmt = fmt.replace(/%/g,function(x) { mul++; return ""; });
+  fmt = fmt.replace(/%/g,function() { mul++; return ""; });
   if(mul !== 0) return write_num(type, fmt, val * Math.pow(10,2*mul)) + fill("%",mul);
 ```
 
@@ -467,6 +467,29 @@ The next few simplifications ignore leading optional sigils (`#`):
   if((r = fmt.match(/^#,#*,#0/))) return write_num(type,fmt.replace(/^#,#*,/,""),val);
 ```
 
+The `Zip Code + 4` format needs to treat an interstitial hyphen as a character:
+
+```
+  if((r = fmt.match(/^([0#]+)-([0#]+)$/))) {
+    ff = write_num(type, fmt.replace(/-/,""), val);
+    return ff.substr(0,ff.length - r[2].length) + "-" + ff.substr(ff.length-r[2].length);
+  }
+  if((r = fmt.match(/^([0#]+)-([0#]+)-([0#]+)$/))) {
+    ff = write_num(type, fmt.replace(/-/g,""), val);
+    return ff.substr(0,ff.length - r[2].length - r[3].length) + "-" + ff.substr(ff.length-r[2].length - r[3].length, r[2].length) + "-" + ff.substr(ff.length-r[3].length);
+  }
+```
+
+There's a better way to generalize the phone number and other formats in terms
+of first drawing the digits, but this selection allows for more nuance:
+
+```
+  if(fmt == "(###) ###-####") {
+    ff = write_num(type, "##########", val);
+    return "(" + ff.substr(0,3) + ") " + ff.substr(3, 3) + "-" + ff.substr(6);
+  }
+```
+
 The frac helper function is used for fraction formats (defined below).
 
 ```
@@ -717,13 +740,13 @@ Having determined the smallest time unit, round appropriately:
   switch(bt) {
     case 0: break;
     case 1:
-      if(dt.u >= .5) { dt.u = 0; ++dt.S; }
-      if(dt.S >= 60) { dt.S = 0; ++dt.M; }
-      if(dt.M >= 60) { dt.M = 0; ++dt.H; }
+      if(dt.u >= 0.5) { dt.u = 0; ++dt.S; }
+      if(dt.S >=  60) { dt.S = 0; ++dt.M; }
+      if(dt.M >=  60) { dt.M = 0; ++dt.H; }
       break;
     case 2:
-      if(dt.u >= .5) { dt.u = 0; ++dt.S; }
-      if(dt.S >= 60) { dt.S = 0; ++dt.M; }
+      if(dt.u >= 0.5) { dt.u = 0; ++dt.S; }
+      if(dt.S >=  60) { dt.S = 0; ++dt.M; }
       break;
   }
 ```
@@ -740,7 +763,7 @@ Finally, actually write the numbers:
         out[i].t = 't'; break;
       case 'n': case '(': case '?':
         var jj = i+1;
-        while(out[jj] && ("?D".indexOf(out[jj].t) > -1 || (" t".indexOf(out[jj].t) > -1 && "?t".indexOf((out[jj+1]||{}).t)>-1 && (out[jj+1].t == '?' || out[jj+1].v == '/')) || out[i].t == '(' && (out[jj].t == ')' || out[jj].t == 'n') || out[jj].t == 't' && (out[jj].v == '/' || '$€'.indexOf(out[jj].v) > -1 || (out[jj].v == ' ' && (out[jj+1]||{}).t == '?')))) {
+        while(out[jj] && ("?D".indexOf(out[jj].t) > -1 || (" t".indexOf(out[jj].t) > -1 && "?t".indexOf((out[jj+1]||{}).t)>-1 && (out[jj+1].t == '?' || out[jj+1].v == '/')) || out[i].t == '(' && (")n ".indexOf(out[jj].t) > -1) || out[jj].t == 't' && (out[jj].v == '/' || '$€'.indexOf(out[jj].v) > -1 || (out[jj].v == ' ' && (out[jj+1]||{}).t == '?')))) {
           out[i].v += out[jj].v;
           delete out[jj]; ++jj;
         }
@@ -894,7 +917,34 @@ it is treated as the text format
     default: throw "cannot find right format for |" + fmt + "|";
   }
   if(typeof v !== "number") return [fmt.length, fmt[3]];
-  return [l, v > 0 ? fmt[0] : v < 0 ? fmt[1] : fmt[2]];
+```
+
+Here we have to scan for conditions:
+
+```
+  var ff = v > 0 ? fmt[0] : v < 0 ? fmt[1] : fmt[2];
+  if(fmt[0].match(/\[[=<>]/) || fmt[1].match(/\[[=<>]/)) {
+    var chk = function(v, rr, out) {
+      if(!rr) return null;
+      var found = false;
+      var thresh = Number(rr[2]);
+      switch(rr[1]) {
+        case "=":  if(v == thresh) found = true; break;
+        case ">":  if(v >  thresh) found = true; break;
+        case "<":  if(v <  thresh) found = true; break;
+        case "<>": if(v != thresh) found = true; break;
+        case ">=": if(v >= thresh) found = true; break;
+        case "<=": if(v <= thresh) found = true; break;
+      }
+      return found ? out : null;
+    }
+    var m1 = fmt[0].match(/\[([=<>]*)([-]?\d+)\]/);
+    var m2 = fmt[1].match(/\[([=<>]*)([-]?\d+)\]/);
+    return chk(v, m1, [l, fmt[0]])
+        || chk(v, m2, [l, fmt[1]])
+        || [l, fmt[m1&&m2?2:1]];
+  }
+  return [l, ff];
 }
 ```
 
@@ -1071,7 +1121,7 @@ coveralls:
 ```json>package.json
 {
   "name": "ssf",
-  "version": "0.6.1",
+  "version": "0.6.2",
   "author": "SheetJS",
   "description": "pure-JS library to format data using ECMA-376 spreadsheet Format Codes",
   "keywords": [ "format", "sprintf", "spreadsheet" ],
diff --git a/test/oddities.json b/test/oddities.json
index dfdabcc..a722e27 100644
--- a/test/oddities.json
+++ b/test/oddities.json
@@ -71,5 +71,12 @@
     [123456822333333000000, " 123,456,822,333,333,000.00"],
     [1234568223333330000000, " 1,234,568,223,333,330,000.00"]
   ],
+  ["00000-0000", [941051630, "94105-1630"]],
+  ["000-00-0000", [123456789, "123-45-6789"]],
+  ["[<=9999999]###-####;(###) ###-####", [8675309, "867-5309"],[2813308004, "(281) 330-8004"]],
+  ["[Red][<-25]General;[Blue][>25]General;[Green]General;[Yellow]General", [50, "50"],[26, "26"],[25,"25"],[1,"1"],[0,"0"],[-1,"-1"],[-25,"-25"],[-26,"26","#"],[-50,"50","#"], ["foo","foo"],["bar","bar"]],
+  ["[Red][<=-25]General;[Blue][>=25]General;[Green]General;[Yellow]General", [50, "50"],[26, "26"],[25,"25"],[1,"1"],[0,"0"],[-1,"-1"],[-25,"-25"],[-26,"26","#"],[-50,"50","#"], ["foo","foo"],["bar","bar"]],
+  ["[Red][=50]General;[Blue]000", [50, "50"], [51, "051"], [49, "049"]],
+  ["[Red][<>50]General;[Blue]000", [50, "050"], [51, "51"], [49, "49"]],
   ["\"foo\";\"bar\";\"baz\";\"qux\";\"foobar\"", [1], [0], [-1], ["sheetjs"]]
 ]