diff --git a/color/basic.go b/color/basic.go
index b2b3ca4..99247a1 100644
--- a/color/basic.go
+++ b/color/basic.go
@@ -82,15 +82,9 @@ func (b *Basic) unformat() string {
 	return fmt.Sprintf("%s[%dm", escape, Reset)
 }
 
-// Format returns a string wrapped in the basic color
 func (b *Basic) Format(text string) string {
 	if len(b.Attrs) > 0 {
 		return b.wrap(text)
 	}
 	return text
 }
-
-// Formatf returns a formatted string wrapped in the basic color
-func (b *Basic) Formatf(format string, v ...interface{}) string {
-	return b.Format(fmt.Sprintf(format, v...))
-}
diff --git a/color/basic_colors.go b/color/basic_colors.go
index f44ebcc..0a9ca24 100644
--- a/color/basic_colors.go
+++ b/color/basic_colors.go
@@ -47,24 +47,3 @@ const (
 	BgHiCyan
 	BgHiWhite
 )
-
-var attrCache = make(map[BasicAttribute]*Basic)
-
-func attr(a BasicAttribute) *Basic {
-	if c, ok := attrCache[a]; ok {
-		return c
-	}
-	c := New(a)
-	attrCache[a] = c
-	return c
-}
-
-// Format is a quick way to format a string using a single attribute
-func (a BasicAttribute) Format(text string) string {
-	return attr(a).Format(text)
-}
-
-// Format is a quick way to format a formatted string using a single attribute
-func (a BasicAttribute) Formatf(text string, v ...interface{}) string {
-	return attr(a).Formatf(text, v...)
-}
diff --git a/color/color.go b/color/color.go
index df5d90f..2cd4e02 100644
--- a/color/color.go
+++ b/color/color.go
@@ -8,7 +8,6 @@ const escape = "\x1b"
 
 type Color interface {
 	Format(text string) string
-	Formatf(text string, v ...interface{}) string
 }
 
 // ParseLevel parses a string and returns a Beaver Level's Color, defaulting to Info
diff --git a/color/extended.go b/color/extended.go
index a8a7798..0a08b84 100644
--- a/color/extended.go
+++ b/color/extended.go
@@ -43,12 +43,6 @@ func (e *Extended) unformat() string {
 	return fmt.Sprintf("%s[%dm", escape, Reset)
 }
 
-// Format returns a string wrapped in the extended color
 func (e *Extended) Format(text string) string {
 	return e.wrap(text)
 }
-
-// Formatf returns a formatted string wrapped in the extended color
-func (e *Extended) Formatf(text string, v ...interface{}) string {
-	return e.wrap(fmt.Sprintf(text, v...))
-}
diff --git a/color/true.go b/color/true.go
index 5601db1..3d6aa5e 100644
--- a/color/true.go
+++ b/color/true.go
@@ -40,12 +40,6 @@ func (t *True) unformat() string {
 	return fmt.Sprintf("%s[%dm", escape, Reset)
 }
 
-// Format returns a string wrapped in the true color
 func (t *True) Format(text string) string {
 	return t.wrap(text)
 }
-
-// Formatf returns a formatted string wrapped in the true color
-func (t *True) Formatf(text string, v ...interface{}) string {
-	return t.wrap(fmt.Sprintf(text, v...))
-}
diff --git a/level.go b/level.go
index 7b1004f..baf8887 100644
--- a/level.go
+++ b/level.go
@@ -3,6 +3,7 @@ package beaver
 import (
 	"fmt"
 	"strings"
+	"time"
 
 	"go.jolheiser.com/beaver/color"
 )
@@ -104,3 +105,38 @@ func ParseLevel(level string) Level {
 	}
 	return INFO
 }
+
+func timePrefix(t time.Time) string {
+	var buf = &[]byte{}
+	year, month, day := t.Date()
+	itoa(buf, int(month), 2)
+	*buf = append(*buf, '/')
+	itoa(buf, day, 2)
+	*buf = append(*buf, '/')
+	itoa(buf, year, 4)
+	*buf = append(*buf, ' ')
+
+	hour, min, sec := t.Clock()
+	itoa(buf, hour, 2)
+	*buf = append(*buf, ':')
+	itoa(buf, min, 2)
+	*buf = append(*buf, ':')
+	itoa(buf, sec, 2)
+
+	return string(*buf)
+}
+
+func itoa(buf *[]byte, i int, wid int) {
+	var b [20]byte
+	bp := len(b) - 1
+	for i >= 10 || wid > 1 {
+		wid--
+		q := i / 10
+		b[bp] = byte('0' + i - q*10)
+		bp--
+		i = q
+	}
+	// i < 10
+	b[bp] = byte('0' + i)
+	*buf = append(*buf, b[bp:]...)
+}
diff --git a/logger.go b/logger.go
index 39c096d..d586d9b 100644
--- a/logger.go
+++ b/logger.go
@@ -42,7 +42,7 @@ func (l *Logger) write(level Level, text string) {
 	if l.Level <= level {
 		var message string
 		if l.Format.TimePrefix {
-			message += color.Time.Format(time.Now().Format("01/02/2006 15:04:05")) + " "
+			message += color.Time.Format(timePrefix(time.Now())) + " "
 		}
 		if l.Format.StackPrefix {
 			_, file, line, _ := runtime.Caller(l.skip)