Having this error while sending email from ubuntu machine

[naina-emmanuel]

./email.sh: line 8: Tue, 24 Dec 2019 20:31:17 +0500: command not found

• Hostname was NOT found in DNS cache
• Trying 52.94.225.234...
• Connected to email.us-east-1.amazonaws.com (52.94.225.234) port 443 (#0)
• successfully set certificate verify locations:
• CAfile: none
  CApath: /etc/ssl/certs
• SSLv3, TLS handshake, Client hello (1):
• SSLv3, TLS handshake, Server hello (2):
• SSLv3, TLS handshake, CERT (11):
• SSLv3, TLS handshake, Server key exchange (12):
• SSLv3, TLS handshake, Server finished (14):
• SSLv3, TLS handshake, Client key exchange (16):
• SSLv3, TLS change cipher, Client hello (1):
• SSLv3, TLS handshake, Finished (20):
• SSLv3, TLS change cipher, Client hello (1):
• SSLv3, TLS handshake, Finished (20):
• SSL connection using ECDHE-RSA-AES128-SHA
• Server certificate:

•    subject: CN=email.us-east-1.amazonaws.com
  

•    start date: 2019-10-16 00:00:00 GMT
  

•    expire date: 2020-09-18 12:00:00 GMT
  

•    subjectAltName: email.us-east-1.amazonaws.com matched
  

•    issuer: C=US; O=Amazon; OU=Server CA 1B; CN=Amazon
  

•    SSL certificate verify ok.
  

POST / HTTP/1.1
User-Agent: curl/7.35.0
Host: email.us-east-1.amazonaws.com
Accept: /
X-Amzn-Authorization: AWS3-HTTPS AWSAccessKeyId=, Algorithm=HmacSHA256, Signature=thNnmggU2ex3L5XXeMNfxf8Wl8STcVZTxscSFEKSxa0=
Content-Length: 266
Content-Type: application/x-www-form-urlencoded

• upload completely sent off: 266 out of 266 bytes
  < HTTP/1.1 400 Bad Request
  < x-amzn-RequestId: 10bef69d-7aa0-4d9b-96a8-9e728d1ee46d
  < Content-Type: text/xml
  < Content-Length: 312
  < Date: Fri, 27 Dec 2019 09:25:29 GMT
  <

Sender MissingParameter Either Date or x-amz-date header must be specified in the request 10bef69d-7aa0-4d9b-96a8-9e728d1ee46d * Connection #0 to host email.us-east-1.amazonaws.com left intact