Remove due date from assignment 1 to prevent further student confusion

www/assignments/1.scrbl

@@ -1,9 +1,16 @@
 #lang scribble/manual
-@(require "../defns.rkt")
+@(require "../defns.rkt"
+          (only-in scribble/html/html div))
 
 @title[#:tag "Assignment 1" #:style 'unnumbered]{Assignment 1: Learning about Programming Languages}
 
-@bold{Due: Thursday, 8, 11:59PM}
+@; @bold{Due: Thursday, 8, 11:59PM}
+@bold{Due: No due date yet.}
+
+@nested[#:style "warning"]{This assignment has not yet been officially
+released. The specification is provided now so you can get a head start if you
+like, but you will not be able to submit the assignment until it is officially
+released.}
 
 Find two programming languages that are new to you, and answer the following questions:
 
@@ -33,7 +40,10 @@ Racket, Ruby, Scheme, SML, Visual Basic.
 
 @section[#:style 'unnumbered]{What to turn in}
 
-Submit this assignment via @link[@gradescope]{Gradescope}.
+@;{Submit this assignment via @link[@gradescope]{Gradescope}.}
+
+Until this assignment is officially assigned (see the due date), submissions
+will not be accepted.
 
 @;{We will be using GitHub Classroom.  This means you will work with git
 repositories and turning in your work consists of pushing the

www/css/extra.css

@@ -30,6 +30,13 @@ visibility:hidden;
     padding: 10px;
 }
 
+.warning {
+    color: red;
+    background-color: #fbc9c7;
+    border: 1px solid red;
+    padding: 10px;
+}
+
 .tocset td a.tocviewselflink {
    color: black;
    text-decoration: underline;
@@ -54,7 +61,7 @@ visibility:hidden;
     background-color: hsl(293, 33%, 90%);
 }
 
-a, .toclink, .toptoclink, .tocviewlink, .tocviewselflink, .tocviewtoggle, .plainlink, 
+a, .toclink, .toptoclink, .tocviewlink, .tocviewselflink, .tocviewtoggle, .plainlink,
 .techinside, .techoutside:hover, .techinside:hover {
     color: hsl(296, 100%, 22%);
 }