diff --git a/README.md b/README.md
index 595a47b..808df63 100644
--- a/README.md
+++ b/README.md
@@ -36,19 +36,19 @@ research and community of [Web3Privacy Now](https://web3privacy.info).
 | summit | `s1` | **2023-06-05** | 🇨🇿 Prague | 16 | [PBW](https://prgblockweek.com/)+[ETHPrague](https://ethprague.com/) | Tree | [web](https://prague.web3privacy.info/), [git](https://github.com/web3privacy/w3ps1) |
 | meetup | `rom1` | **2023-10-05** | 🇮🇹 Rome | 10 | [ETHRome](https://ethrome.org/) | PG | [web](https://lu.ma/web3privacynow_rome) |
 | meetup | `prg1` | **2023-11-14** | 🇨🇿 Prague | 5 | [DCxPrague](https://dcxprague.org/) | Tree | [web](https://lu.ma/w3pm-prg1) |
-| meetup | `bcn1` | 2024/Q1 | 🇪🇸 Barcelona | 3 |  | Tree |  |
-| meetup | `itxx` | 2024/Q1 | 🇮🇹 Italy (TBD) | 3 |  | PG |  |
-| meetup | `lib1` | 2024/Mar | 🇨🇿 Liberec | 3 | [ETHBohemia](https://ethbohemia.ethevents.club/) | Tree |  |
+| meetup | `bcn1`* | 2024/Q1 | 🇪🇸 Barcelona | 3 |  | Tree |  |
+| meetup | `itxx`* | 2024/Q1 | 🇮🇹 Italy (TBD) | 3 |  | PG |  |
+| meetup | `lib1`* | 2024/Mar | 🇨🇿 Liberec | 3 | [ETHBohemia](https://ethbohemia.ethevents.club/) | Tree |  |
 | meetup | `ams1` | 2024/Apr | 🇳🇱 Amsterdam | 3 | [ETHDam 2024](https://www.ethdam.com/) | - |  |
-| meetup | `tal1` | 2024/Apr | 🇪🇪 Tallinn | 3 | [ETHTallinn](https://www.ethtallinn.org/) | - |  |
-| meetup | `por1` | 2024/May | 🇵🇹 Porto | 3 | [ETHPorto](https://ethporto.org/) | - |  |
+| meetup | `tal1`* | 2024/Apr | 🇪🇪 Tallinn | 3 | [ETHTallinn](https://www.ethtallinn.org/) | - |  |
+| meetup | `por1`* | 2024/May | 🇵🇹 Porto | 3 | [ETHPorto](https://ethporto.org/) | - |  |
 | meetup | `ber1` | 2024/May | 🇩🇪 Berlin | 3 | ETHBerlin 4 | Tree |  |
 | summit | `s2` | 2024/Jun | 🇨🇿 Prague | 16 | ETHPrague 2024 | Tree |  |
 | hackathon | `h1` | 2024/Jun | 🇸🇮 Bled | 10 |  | Tree |  |
 | meetup | `lju1` | 2024/Jun | 🇸🇮 Ljubljana | 5 | W3PN Hackathon | Tree |  |
-| meetup | `bcn2` | 2024/Jul | 🇪🇸 Barcelona | 3 | ETHBarcelona (?) | - |  |
+| meetup | `bcn2`* | 2024/Jul | 🇪🇸 Barcelona | 3 | ETHBarcelona (?) | - |  |
 | meetup | `bru1` | 2024/Jul | 🇧🇪 Brussels | 3 | [EthCC 7](https://www.ethcc.io/) | Mykola |  |
-| meetup | `waw1` | 2024/Sep | 🇵🇱 Warsaw | 3 | ETHWarsaw (?) | Tree |  |
+| meetup | `waw1`* | 2024/Sep | 🇵🇱 Warsaw | 3 | ETHWarsaw (?) | Tree |  |
 | meetup | `rom2` | 2024/Oct | 🇮🇹 Rome | 5 | ETHRome 2024 | PG |  |
 | summit | `s3` | 2024/Nov | 🇨🇿 Brno | 16 | ETHBrno 2024 | Tree |  |
 | meetup | `dc1` | 2024/Q4 | 🏴‍☠️ SE Asia | 5 | [Devcon 7](https://devcon.org/) | - |  |
diff --git a/README.tpl.eta b/README.tpl.eta
index a9203bd..248915a 100644
--- a/README.tpl.eta
+++ b/README.tpl.eta
@@ -27,7 +27,7 @@ research and community of [Web3Privacy Now](https://web3privacy.info).
 | type | # id | date | location | 🎰 | coincidence | dri | links |
 | --- | --- | --- | --- | --- | --- | --- | --- |
 <% it.events.forEach(function(event, i){ %>
-| <%= event.type %> | `<%= event.id.replace("w3pm-", "").replace(/^w3p/, '') %>` | <%= event.date.match(/^\d{4}-\d{2}-\d{2}$/) ? `**${event.date}**` : event.date %> | <%= it.getFlagEmoji(event.country) %> <%= event.city %> | <%= event.slots || '-' %> | <%= event.coincidence %> | <%= event.lead || "-" %> | <%= (event.links && Object.keys(event.links).map(k => `[${k}](${event.links[k]})`).join(", ")) || "" %> |
+| <%= event.type %> | `<%= event.id.replace("w3pm-", "").replace(/^w3p/, '') %>`<% if (event.optional) { %>*<% } %> | <%= event.date.match(/^\d{4}-\d{2}-\d{2}$/) ? `**${event.date}**` : event.date %> | <%= it.getFlagEmoji(event.country) %> <%= event.city %> | <%= event.slots || '-' %> | <%= event.coincidence %> | <%= event.lead || "-" %> | <%= (event.links && Object.keys(event.links).map(k => `[${k}](${event.links[k]})`).join(", ")) || "" %> |
 <% }) %>
 
 [Source file](./events/events.yaml)
diff --git a/events/events.yaml b/events/events.yaml
index 4f2c11c..a051f11 100644
--- a/events/events.yaml
+++ b/events/events.yaml
@@ -41,6 +41,7 @@
   country: es
   coincidence: ""
   lead: Tree
+  optional: true
   slots: 3
 
 - id: w3pm-itxx
@@ -50,6 +51,7 @@
   country: it
   coincidence: ""
   lead: PG
+  optional: true
   slots: 3
 
 - id: w3pm-lib1
@@ -59,6 +61,7 @@
   country: cz
   coincidence: "[ETHBohemia](https://ethbohemia.ethevents.club/)"
   lead: Tree
+  optional: true
   slots: 3
 
 - id: w3pm-ams1
@@ -78,6 +81,7 @@
   # ETHTallinn - April 19 - 21, 2024
   coincidence: "[ETHTallinn](https://www.ethtallinn.org/)"
   slots: 3
+  optional: true
 
 - id: w3pm-por1
   type: meetup
@@ -86,6 +90,7 @@
   country: pt
   coincidence: "[ETHPorto](https://ethporto.org/)"
   slots: 3
+  optional: true
 
 - id: w3pm-ber1
   type: meetup
@@ -132,6 +137,7 @@
   country: es
   coincidence: "ETHBarcelona (?)"
   slots: 3
+  optional: true
 
 - id: w3pm-bru1
   type: meetup
@@ -151,6 +157,7 @@
   coincidence: "ETHWarsaw (?)"
   lead: Tree
   slots: 3
+  optional: true
 
 - id: w3pm-rom2
   type: meetup
diff --git a/schema.yaml b/schema.yaml
index 6ec391b..7625511 100644
--- a/schema.yaml
+++ b/schema.yaml
@@ -34,6 +34,8 @@ $defs:
         type: number
       visitors:
         type: number
+      optional:
+        type: boolean
       links:
         type: object
         additionalProperties: false