Fix dates, be less paranoid about l10n ids

The strings will get updated, even if the id persists.

src/views/conference/2020/index/index.jsx

@@ -28,13 +28,13 @@ const ConferenceSplash = () => (
         <div className="inner">
             <section className="conf2020-panel mod-desc">
                 <p className="conf2020-panel-desc">
-                    <FormattedMessage id="conference-2020.desc3" />
+                    <FormattedMessage id="conference-2020.desc1" />
                     <br />
                     <br />
-                    <FormattedMessage id="conference-2020.desc4" />
+                    <FormattedMessage id="conference-2020.desc2" />
                     <br />
                     <br />
-                    <FormattedMessage id="conference-2020.desc5" />
+                    <FormattedMessage id="conference-2020.desc3" />
                 </p>
                 <table className="conf2020-panel-details">
                     <tbody>
@@ -51,7 +51,7 @@ const ConferenceSplash = () => (
                                 <FormattedDate
                                     day="2-digit"
                                     month="long"
-                                    value={new Date(2020, 6, 22)}
+                                    value={new Date(2020, 6, 23)}
                                     year="numeric"
                                 />
                                 {' - '}
@@ -85,7 +85,7 @@ const ConferenceSplash = () => (
                     </div>
                 </FlexRow>
                 <p className="conf2020-panel-desc">
-                    <FormattedMessage id="conference-2020.conferenceFee" />
+                    <FormattedMessage id="conference-2020.registrationFee" />
                     <br />
                     <FormattedMessage id="conference-2020.registrationOpen" />
                 </p>

src/views/conference/2020/index/l10n.json

 {
     "conference-2020.title": "Scratch Conference 2020:",
     "conference-2020.subtitle": "Let's Create Together!",
-    "conference-2020.dateDesc": "July 22-25, 2020 | Cambridge, MA, USA",
+    "conference-2020.dateDesc": "July 23-25, 2020 | Cambridge, MA, USA",
     "conference-2020.dateDescMore": " (with opening reception the evening of July 22)",
     "conference-2020.locationDetails": "MIT Media Lab, Cambridge, MA",
     "conference-2020.seeBelow": "Learn more about conference dates and locations below.",
@@ -9,12 +9,12 @@
     "conference-2020.date": "When:",
     "conference-2020.location": "Where:",
 
-    "conference-2020.desc3": "Join us for the Scratch Conference, an international gathering where educators, researchers, and developers share ideas for supporting creative learning with Scratch.",
-    "conference-2020.desc4": "Scratch has become the world's largest coding community for children around the world. The conference offers hands-on workshops, panel discussions, and interactive demonstrations to explore ways for using Scratch to expand creative learning experiences for diverse learners across subject areas.",
-    "conference-2020.desc5": "Together we'll exchange ideas and strategies on how to use Scratch to engage students in learning to think creatively, reason systematically, and work collaboratively—essential skills for everyone in today’s society.",
+    "conference-2020.desc1": "Join us for the Scratch Conference, an international gathering where educators, researchers, and developers share ideas for supporting creative learning with Scratch.",
+    "conference-2020.desc2": "Scratch has become the world's largest coding community for children around the world. The conference offers hands-on workshops, panel discussions, and interactive demonstrations to explore ways for using Scratch to expand creative learning experiences for diverse learners across subject areas.",
+    "conference-2020.desc3": "Together we'll exchange ideas and strategies on how to use Scratch to engage students in learning to think creatively, reason systematically, and work collaboratively—essential skills for everyone in today’s society.",
 
     "conference-2020.registrationTitle": "Registration:",
-    "conference-2020.conferenceFee": "Conference Fee: $250",
+    "conference-2020.registrationFee": "Conference Fee: $250",
     "conference-2020.registrationOpen": "The conference fee includes 7 meals (3 breakfast, 3 lunches, 1 dinner) plus refreshments during the day. Registration opens on March 3.",
     "conference-2020.register": "Register for the conference!",