user6113: I'd like to know the exact date when the slot duration was set to 1 sec on Cardano Testnet.
Thanks in advance!

user5760: I did a little bit of digging. Block 1597133, created on 2020/07/28 20:20:16 was the first block to use 1 second per slot.




Epoch
Slot
Block
Created
Delta Next Slot
Delta Next Created
Time Per Slot




73
1598398
1597131
2020/07/28 20:19:36
1
00:00:20
00:00:20


73
1598399
1597132
2020/07/28 20:19:56
1
00:00:20
00:00:20


74
1598400
1597133
2020/07/28 20:20:16
20
00:00:20
00:00:01


74
1598420
1597134
2020/07/28 20:20:36
20
00:00:20
00:00:01


74
1598440
1597135
2020/07/28 20:20:56








Delta Previous Slot is the difference between the block's slot and the one before it
Delta Previous Created is the difference between the blocks creation date and the one before it
Time Per Slot is Delta Previous Created divided by Delta Previous Slot

Page on Cardano Testnet Blockchain Explorer with these blocks

6113: <p>I'd like to know the exact date when the slot duration was set to 1 sec on Cardano Testnet.</p>
<p>Thanks in advance!</p>
 5760: <p>I did a little bit of digging. Block <strong>1597133</strong>, created on <strong>2020/07/28 20:20:16</strong> was the first block to use 1 second per slot.</p>
<div class="s-table-container">
<table class="s-table">
<thead>
<tr>
<th style="text-align: right;">Epoch</th>
<th style="text-align: right;">Slot</th>
<th style="text-align: right;">Block</th>
<th style="text-align: right;">Created</th>
<th style="text-align: right;">Delta Next Slot</th>
<th style="text-align: right;">Delta Next Created</th>
<th style="text-align: right;">Time Per Slot</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align: right;">73</td>
<td style="text-align: right;">1598398</td>
<td style="text-align: right;">1597131</td>
<td style="text-align: right;">2020/07/28 20:19:36</td>
<td style="text-align: right;">1</td>
<td style="text-align: right;">00:00:20</td>
<td style="text-align: right;">00:00:20</td>
</tr>
<tr>
<td style="text-align: right;">73</td>
<td style="text-align: right;">1598399</td>
<td style="text-align: right;">1597132</td>
<td style="text-align: right;">2020/07/28 20:19:56</td>
<td style="text-align: right;">1</td>
<td style="text-align: right;">00:00:20</td>
<td style="text-align: right;">00:00:20</td>
</tr>
<tr>
<td style="text-align: right;">74</td>
<td style="text-align: right;">1598400</td>
<td style="text-align: right;"><strong>1597133</strong></td>
<td style="text-align: right;">2020/07/28 20:20:16</td>
<td style="text-align: right;">20</td>
<td style="text-align: right;">00:00:20</td>
<td style="text-align: right;"><strong>00:00:01</strong></td>
</tr>
<tr>
<td style="text-align: right;">74</td>
<td style="text-align: right;">1598420</td>
<td style="text-align: right;">1597134</td>
<td style="text-align: right;">2020/07/28 20:20:36</td>
<td style="text-align: right;">20</td>
<td style="text-align: right;">00:00:20</td>
<td style="text-align: right;">00:00:01</td>
</tr>
<tr>
<td style="text-align: right;">74</td>
<td style="text-align: right;">1598440</td>
<td style="text-align: right;">1597135</td>
<td style="text-align: right;">2020/07/28 20:20:56</td>
<td style="text-align: right;"></td>
<td style="text-align: right;"></td>
<td style="text-align: right;"></td>
</tr>
</tbody>
</table>
</div>
<ul>
<li><strong>Delta Previous Slot</strong> is the difference between the block's slot and the one before it</li>
<li><strong>Delta Previous Created</strong> is the difference between the blocks creation date and the one before it</li>
<li><strong>Time Per Slot</strong> is <strong>Delta Previous Created</strong> divided by <strong>Delta Previous Slot</strong></li>
</ul>
<p><a href="https://explorer.cardano-testnet.iohkdev.io/en/browse-blocks.html?page=79857&amp;perPage=20" rel="nofollow noreferrer">Page on Cardano Testnet Blockchain Explorer with these blocks</a></p>
